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0:09
元宵节快乐！
» Google 黑板报 -- Google 中国的博客网志元宵节是农历新年的第一个月圆之夜，象征着春天的到来，人们吃元宵、赏花灯、猜灯谜以示庆贺。Google发布Doodle祝大家元宵节快乐！ -
23:48
德国联邦信息安全办公室（BSI）推荐使用Google Chrome浏览器
» Google 黑板报 -- Google 中国的博客网志作者：Wieland Holfelder博士，Google德国工程总监；Travis McCoy，Chrome浏览器安全团队成员
原文：German Federal Office of Information Security recommends Chrome
为进一步加强用户网络安全、提供建议与指导，德国联邦信息安全办公室（BSI）近日发布了一项关于Windows用户最佳操作指南的报告。安全性一直是Chrome浏览器的核心所在，因此，我们很荣幸地看到BSI报告中对Google Chrome浏览器在网络安全优势方面的认可如下：
“浏览器是用户使用网络服务的核心组成部分，因此浏览器在网络攻击中是最为关键的界面。如有可能，您应该使用一个基于沙盒技术的浏览器。Google Chrome浏览器(https://www.Google.com/chrome)是一款具备这种防护技术的安全浏览器，其它浏览器要么没有此类安全防护机制，要么保护性太差。使用Google Chrome浏览器，加上我们之前提到的其他机制，您可以很大程度地降低网络恶意攻击可能性。”
除了沙盒技术，该指南还强调了Google Chrome浏览器的自动更新功能：
“同样值得肯定的是Google Chrome浏览器的自动更新功能，且实现了与Adobe Flash Player的绑定。这样，与Chrome浏览器同步，Adobe Flash Player也可以保持实时地更新。”
在今年国际互联网安全日到来之前，网络安全仍然面临着诸多挑战。我们希望通过我们的努力不断提高用户的网络安全并保护用户的隐私，让互联网环境越来越好。
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13:27
Review of Oracle Service Bus 11g Development Cookbook (Packt Publishing) by Edwin Biemond, Guido Schmutz, Eric Elzinga et. al.
» AMIS Technology blogRecently I gained access to an electronic copy of the just released Oracle Service Bus 11g Development Cookbook, written by five authors – all experts on OSB and three personal acquaintances of mine. I was very interested in learning about the final result after hearing many intermediate comments during the writing process as well as [...] -
5:06
Sending an email with attachment from Oracle BPEL
» AMIS Technology blogIn my previous post I described how to create a PDF file/report in Oracle BPEL (Create a JasperReport from Oracle BPEL). Now I will describe how to sent this PDF file as attachment in an email. After invoking the createBookService the outcome is used to construct the email message. In particular the filename and the [...] -
4:59
Create a JasperReport from Oracle BPEL
» AMIS Technology blogIn my previous post I described how to create a Report (CDBooklet) with JasperReport in Java. Follow this link to take a look at the post ‘Using Java to create a report with the JasperReport java API’ For this new post I created a webservice wrapper around this reporting functionality and deployed it to a Weblogic [...] -
22:47
Intercepting user customization – such as column reordering in tables – in ADF 11g change persistence
» AMIS Technology blogThe requirement I was facing was simple: act on column reordering through user drag and drop in a rich table. More specifically: invoke a method in a managed bean whenever the user changes the position (or side or visibility) of a column. At first it seemed trivial – just use an AttributeChangeListener. When that turned out [...]
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How to Install apk to Android Devices from Mac OS X
» Chanel [K]在Mac OS X中我们可以使用Android SDK直接将下载到电脑中的apk文件安装到Android设备中。
1. 下载Android SDK，可以从Android Developers网站直接下载，也可以通过MacPorts安装。我采取后一种方式。
$ sudo port install android Password: ---> Fetching archive for android ---> Attempting to fetch android-16_0.darwin_11.x86_64.tbz2 from http://packages.macports.org/android ---> Fetching android ---> Attempting to fetch android-sdk_r16-macosx.zip from http://dl.google.com/android ---> Attempting to fetch android-appbundles-r89422.tar.gz from http://distfiles.macports.org/android ---> Verifying checksum(s) for android ---> Extracting android ---> Configuring android ---> Building android ---> Staging android into destroot ---> Installing android @16_0 ---> Activating android @16_0 ---> Cleaning android
然后通过port contents命令可以获知Android SDK的安装路径。在我的机器上是/opt/local/share/java/android-sdk-mac_x86。
$ port contents android Port android contains: /Applications/MacPorts/Developer/.localized ...... /opt/local/share/java/android-sdk-mac_x86/tools/adb_has_moved.txt /opt/local/share/java/android-sdk-mac_x86/tools/android ......
默认安装的Android SDK是没有adb命令（该命令用于安装apk程序）的，需要运行Android SDK and AVD Manager来进行额外的下载安装。
2. 安装SDK Platform-tools
cd /opt/local/share/java/android-sdk-mac_x86/tools sudo ./android
会显示以下界面，在第一次运行的时候，Android SDK Platform-tools的状态是未安装的，因此我们需要选中该组件，然后点击右下方的“Install packages”按钮。而此处的截图是安装完毕以后的情况。
3. 安装apk软件，当然，这里先要用数据线将Android设备连接到Mac电脑上。
##adb命令是安装到platform-tools目录中，而非上一步android命令所在的tools目录。 $ cd /opt/local/share/java/android-sdk-mac_x86/platform-tools ##先探测是否可以正确识别设备，有设备号和device字样表示正确识别。 $ ./adb devices List of devices attached 01839c14 device ##安装apk软件，本例中安装的是高德移动导航 $ ./adb install /tmp/Autonavi_v1.2.apk 3225 KB/s (4027409 bytes in 1.219s) pkg: /data/local/tmp/Autonavi_v1.2.apk Success
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20:22
New committer: Davide Italiano (src)
» FreeBSD Project NewsNew committer: Davide Italiano (src) -
20:22
October-December, 2011 Status Report
» FreeBSD Project NewsOctober-December, 2011 Status Report
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Get thee to University!
» Oracle BI Publisher BlogFriends of BIP, STR Software have put together a great web based resource 'BIP University'
Focused on the E Business Suite flavor and their own integrations with BIP under EBS R12; its a great resource and well worth a few clicks and a read. Check it out here - http://www.bipuniversity.com/
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How to Use Port in Mac OS X to Install New Utilities
» Chanel [K]假设我们想要在Mac OS X中安装：
MySQL，这是一个开源的免费的数据库，当然备Oracle收购之后有一些变化。
postgreSQL，这又是另外一个开源的免费的数据库。
perl，这是一种流行的编程语言。
lua，这又是另外一种流行的编程语言。
watch，这是一个实用程序，可以默认每隔2秒重复执行某条命令，比如你想监控一个目录下的文件生成情况，这条命令就很有用。
tree，这是一个实用程序，可以提供类似于ls -R的功能，但是输出是更加直观的树状结构。当然，我们可以在网络中一个一个地找这些程序，然后一个一个地安装，用不同的安装方法，但是，你也可以选择非常简单的方法，这就是本文要介绍的MacPorts。
在Linux中如果我们要安装一些软件，要解决各个软件之间的包依赖性关系，我们会使用到apt-get（Ubuntu）或者yum（Redhat，CentOS）或者zypper（openSUSE），如果你熟悉一些Linux的话，对于这些软件包管理程序应该有所耳闻。而MacPorts正是在Mac OS X上的软件包管理程序。
安装MacPorts最简单的方法是直接下载dmg文件，双击安装 － Lion版安装文件 | Snow Leopard版安装文件。
MacPorts安装完以后，我们就可以通过命令行的方式来安装其它软件了，可以参看具体命令文档。以下列出常用的命令：
1. 更新本地软件库列表，该命令可以不定时多次执行（sudo以后需要输入密码，输入你自己用户的密码即可）。
sudo port selfupdate
2. 列出软件库中有哪些软件，注意，该命令会输出大量软件名称，因此建议添加more来查看，或者使用后面的search命令。
port list | more
3. 检索需要安装的软件。
port search <software_name>
当然，还有更精确地搜索，比如如果直接port search tree会出现上百个结果，但是如果执行以下命令，就只会出现一个结果。
$ port search --name --exact tree tree @1.6.0 (sysutils) display tree-view of directories with optional color/HTML output4. 列出已经通过port安装的软件。
port installed
5. 安装软件，一些具有依赖性的软件会连带自动安装，比如安装LUA,会安装ncurses和readline。
sudo port install <software_name>
6. 卸载软件。
sudo port uninstall <software_name>
7. 清理未成功安装的软件，比如一些软件由于编译问题或者其它原因没有安装成功。
sudo port clean --all <software_name>
8. 查看安装的软件都安装了哪些内容。
port contents <software_name>
比如查看tree都安装了哪些内容。
$ port contents tree Port tree contains: /opt/local/bin/tree /opt/local/share/doc/tree/CHANGES /opt/local/share/doc/tree/LICENSE /opt/local/share/doc/tree/README /opt/local/share/man/man1/tree.1.gz
9. 升级当前安装过的软件。
sudo port upgrade <software_name>
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Oracle Policy Automation and BI Publisher
» Oracle BI Publisher BlogYep, found another integration with BIP. I get asked about Oracle Policy Automation quite a lot; I do not profess to know much; enough to be dangerous I guess. However, I was not aware that they had been working with BIP to help automate the generation of documents from the system.
For the uninitiated, here's the blurb care of :
Oracle Policy Modeling is a Windows desktop application for transforming legislation and policy documents into executable business rules. Rules are written in Word and Excel documents using phrases in languages such as English, Chinese and French. These rule documents can be shared amongst business and information technology stakeholders, and commentary can be added into the documents without affecting the structure of the rules themselves. Other features of Oracle Policy Modeling include integrated test case execution and debugging capabilities, and the definition of interviews for interactive rule-based assessments. Interview screen order and branching logic can be defined using visual flow diagrams.
In other words, a cool piece of technology, but tell us Tim how is it used? Well, it has been publicly deployed within several government web-sites. Australia's Department of Immigration uses it for visitors to check their eligibility for visas. The UK uses it for their Employment Status Indicator assessment tool, the UK governments online portal for businesses also uses OPA for over 60 interactive tools while the United States uses the software for guidance on tax law. The last one might be pertinent for me this weekend as W-2s have arrived and I have a night of misery trying to get a refund.
How does BIP fit in? Pictures are worth a thousands words and Fiona from the development team down under has recorded a great YouTube session explaining the integration and how to take advantage of it. I know I'm becoming more American cos I found it a little hard to place her accent at first, not to be rude Fiona but was it Brit, Aussie or maybe New Zealand? I plumped for Aussie, 10 points to me ... phew!
Direct link to the OPA YouTube channel - some other great vids on use cases and features.
You can find the OPA Homepage here lots of info on the tool and its possible applications.
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Install GI and DB PSU 11.2.0.2.5 Failed in VirtualBox
» Chanel [K]Oracle的Apply Patchset的方法一直是为人诟病的，其实步骤复杂倒也罢了，怕的是Oracle总在不停地修改Apply Patch的方法，Oracle的原意是让Apply Patch的语法越来越简单，但是各种各样的Patch，各种不同的命令，特别是很大的Bundle Patch，如果不仔细阅读Readme，千万不要轻易出手。
这次尝试在自己的VirtualBox虚拟机OEL6中给之前安装的GI（Oracle Restart）+ ASM + Oracle Database安装最新的11.2.0.2.5 PSU，遇到各种问题。
1. Patch解压的目录必须是grid用户和oracle用户拥有写权限的，如果没有写权限，会报错：
Opatch version check failed for oracle home /u01/app/oracle/product/11.2.0/dbhome_1 Opatch version check failed update the opatch version for the failed homes and retry
安装需求是使用root用户来安装（这是我第一次看到在安装PSU的时候要求使用root用户），而我的虚拟机中由于没有足够的磁盘空间，所以将Mac中的下载目录作为Shared Folder映射到虚拟机中，因此改目录的属主是root，用户组是vboxsf，而且并不允许使用chmod直接修改。因此出现了权限问题。我的解决方法是将grid用户和oracle用户都加入vboxsf组中。
建议：在真实环境中，Patch解压目录应该属于dba用户组。
2. 我的Patch是解压在/media/sf_PSU目录下，解压以后生成了p13343447_112020_Linux-x86-64目录，其下有两个目录分别是13343424（这是DB PSU）和13343447（这是GI PSU），整个目录结构如下所示：
|-media |--sf_PSU |---p13343447_112020_Linux-x86-64 |-----13343424 |-----13343447
按照Readme文档中描述的，opatch的命令应该写为：
opatch auto <UNZIPPED_PATCH_LOCATION>
此处的UNZIPPED_PATCH_LOCATION按照文档描述应该就是/media/sf_PSU目录，因为这是解压目录，但是实际上这份文档是有问题的，如果opatch命令写为：
opatch auto /media/sf_PSU -ocmrf /home/grid/ocm.rsp
其中的-ocmrf是另外一个问题，这个OCM的配置文件，根据Readme文档中描述的方法创建即可。
运行以上命令会报错：
Opatch version check failed for oracle home /u01/app/oracle/product/11.2.0/dbhome_1 Opatch version check failed update the opatch version for the failed homes and retry
是的，你没有看错，我也没有贴错，确实报了一模一样的错误（虽然这两个错误都完全不是opatch版本的问题），所以，opatch的报错信息是不可信的，我们必须要去提示的log文件中仔细查看最后的错误信息。
ZOP-49: Not able to execute the prereq. OPatch cannot inform if the patch satisfies minimum version requirement. PatchObject constructor: Input file "/media/sf_PSU/p13343447_112020_Linux-x86-64/etc/config/actions" or "/media/sf_PSU/p13343447_112020_Linux-x86-64/etc/config/inventory" does not exist.
因此，正确的opatch命令应该是：
opatch auto /media/sf_PSU/p13343447_112020_Linux-x86-64 -ocmrf /home/grid/ocm.rsp
3. Oracle软件所在的文件系统剩余空间必须要大于3G，如果不足，会报错：
patch /media/sf_PSU/p13343447_112020_Linux-x86-64/13343447 apply failed for home /u01/app/grid/product/11.2.0/grid ACFS-9459: ADVM/ACFS is not supported on this OS version: 'error: file /etc/SuSE-release: No such file or directory
可以看到，又是一次很无稽的报错信息，/etc/SuSE-release？拜托，这里只有/etc/redhat-release。
那么，仔细检查log文件，会发现如下的报错：
Prerequisite check "CheckSystemSpace" failed. The details are: Required amount of space(3154696080) is not available. UtilSession failed: Prerequisite check "CheckSystemSpace" failed. Log file location: /u01/app/grid/product/11.2.0/grid/cfgtoollogs/opatch/opatch2012-01-27_18-23-48PM.log OPatch failed with error code 73
到此为止，我放弃了在虚拟机中安装PSU 11.2.0.2.5（如果要增加虚拟机中的文件系统剩余空间是非常麻烦的事情），但是我认为解决了磁盘空间问题之后，后面应该不会再有太多问题了。另外，如果在真实环境中这些问题可能都不存在，因为真实环境中文件系统的剩余空间应该远远不止3G，也应该不会有Shared Folder权限的问题，不过目录位置的问题应该还是会遇到，希望这里遇到的问题对将要在产品环境中Apply 11.2.0.2.5 PSU的朋友有帮助。
如果你成功Apply了该版本的Patch，那么也可以留言告诉我你遇到了什么障碍。
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Oracle Database Book and eBook Published: Boost Performance with the Oracle Database 11gR2 Performance Tuning Cookbook
» Oracle Professional
Packt Publishing, one of the world’s leading Publishers of Oracle Training material, is pleased to announce the publication of Oracle Database 11gR2 Performance Tuning Cookbook, a new book and ebook aimed at newcomers to the Oracle Database seeking to solve performance problems faster and in a rigorous way. Birmingham: Packt Publishing, one of the world’s leading Publishers of Oracle Training material, is pleased to announce the publication of Oracle Database 11gR2 Performance Tuning Cookbook, a new book and ebook aimed at newcomers to the Oracle Database seeking to solve performance problems faster and in a rigorous way. Written in a cookbook style by Cirol Fiorillo, Oracle Database 11gR2 Performance Tuning Cookbook is filled with real recipes offering solutions starting from application design and development, through the implementation of well-performing applications, to the details of deployment and delivering best-performance databases. Readers will learn to implement fast and scalable SQL and PL/SQL code, and choose the correct structures to store the data and access them.
Each recipe in the book is based on a script/procedure explained step-by-step, and is aimed at software developers, software and data architects, and DBAs who work with the Oracle Database.
Packt Publishing has developed and published many books on the Oracle Database, and some of the recent titles include:- Oracle Information Integration, Migration, and Consolidation
- OCA Oracle Database 11g: SQL Fundamentals I: A Real World Certification Guide (1ZO-051)
- Oracle 10g/11g Data and Database Management Utilities
- Oracle Database 11g – Underground Advice for Database Administrators
- Mastering Oracle Scheduler in Oracle 11g Databases
- And many more. All Packt’s Oracle books can be found on the Oracle books page.
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1:29
Jouw toekomst als Oracle professional – AMIS informatieavond over jouw ontwikkelingspad
» AMIS Technology blogAls je dit leest en je bent Oracle professional – ontwikkelaar of administrator – is de kans groot dat je jouw carriere bent gestart in de jaren ‘90, in het tijdperk van Oracle7, Oracle Forms en Client/Server applicaties – net voor de opkomst van Java, internet, mobiel en SOA. Misschien ligt je start daar nog [...] -
4:59
Masterclass Oracle 11g voor Database Ontwikkelaars – haal meer uit SQL en PL/SQL in 11g
» AMIS Technology blogAanstaande vrijdag 27 januari verzorgt Oracle ACE Director Alex Nuijten bij AMIS Services in Nieuwegein een Masterclass voor Oracle Database Developers: iedereen die met enige regelmaat SQL en/of PL/SQL toepast in zijn of haar werk. In deze Masterclass leidt Alex de deelnemers rond in Oracle Database 11g Release 1 en 2 met als voornaamste doelstelling [...]
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2:01
新春快乐！
» Google 黑板报 -- Google 中国的博客网志今天是春节，也是龙年的第一天。Google发布Doodle庆祝中国年，并祝大家在龙年身体健康，万事如意。
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0:01
Using the Oracle WebLogic Technology Adapters with custom Java – Message Driven Bean (MDB) triggered by File Adapter (part of the story)
» AMIS Technology blogOracle’s product portfolio contains the Technology Adapters. A set of JCA Connectors that provide a bridge between various technologies – such as JMS, AQ, Database (SQL and PL/SQL), FTP and File System – on the one hand and the world of JEE on the other. The SOA Suite 11g and Oracle Service Bus leverage these [...] -
2:08
Developing and deploying Java Embedding activity in BPEL 2.0 in SOA Suite 11g calling a custom Java Class that has dependencies on 3rd party libraries
» AMIS Technology blogJava Embedded activity can call a custom Java class that relies on 3rd party Java libraries. This means that a lot of existing functionality from the Java open source community is at the disposal of the BPEL developer. This article shows a simple example of developing and deploying a BPEL process that uses Java Embedded [...]
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8:06
在搜索结果中展示更好的页面标题
» Google 黑板报 -- Google 中国的博客网志发表者：Pierre Far，网站管理员趋势分析专员
原文：Better page titles in search results
转载自：谷歌中文网站管理员博客
发布时间：2012年1月20日 下午 01:10:00
页面标题是搜索结果中的重要部分，因为它们是每项搜索结果的第一行字，同时也是用户点击进入网站的直接链接。一直以来，我们都建议网站管理员为他们的网站编写独特的描述性页面标题（以及页面摘要的元描述）向用户展示页面内容。
我们会采取许多方法决定将哪一个标题展示给用户,但如果网站管理员已明确指定，将主要取决于标题标签。对于某些页面来说，单一标题可能无法满足用户所有的查询需求，所以我们的算法库会自动产生出一些备选标题以便用户更轻松地识别相关页面。测试表明，这些备选标题通常更接近查询内容并且能够大幅度提高结果页面的点击率，对搜索用户和网站管理员都有帮助。
如果页面没有标题，或者网站管理员在HTML中规定采用非描述性标题时，也会有备选标题显示出来。比如，只用单词“Home”表示的标题就无法准确、全面地说明页面内容。我们常见的另一个问题是，网站管理员对网站内几乎所有页面都采用了相同的标题，有时候是完全复制，有时候仅做了微小改动。最终，我们还会采用简洁、描述性的备选标题替换冗长、难懂的标题。
为方便您更好地了解如何写好标题和元描述，以及我们采用的生成备选标题的具体方法，我们近期更新了此主题的帮助中心文章，供您参考。而且，当我们发现网站标题有待改进时，我们也会通过网站管理员工具中的HTML建议功能通知相关网站管理员。您可以在网站站长工具首页上，点击相关网站，然后在左侧菜单上点击故障诊断。
如果您有任何疑问或反馈，请在网站管理员帮助论坛上告诉我们。
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23:19
Create simple Java application to post JSON message to CometD Bayeux Channel using Apache HttpClient and Maven style NetBeans project
» AMIS Technology blogThe objective discussed in this article is to post messages to a CometD Bayeux Channel with a standalone Java Class – without dependencies on CometD. For example to control from Java the Slideshow introduced in the synchronized Slideshow demo application created using CometD (see previous articles Push based synchronized Slideshow demo application implemented using CometD [...]
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7:23
网站诊断之建议篇
» Google 黑板报 -- Google 中国的博客网志发表者：谷歌中文搜索质量团队
转载自：谷歌中文网站管理员博客
发布时间：2012年1月18日 上午 10:46:00
几周之前，我们曾邀请非营利性的公益网站站长向我们的搜索质量团队提交他们的网站，参加我们的在线网站诊断活动。感谢积极参加此次活动的公益网站站长！现在我们根据提交的网站，总结出了一些需要改进的地方，并提供了一些建议以及您可以从谷歌获得的资源。虽然本次网站诊断主要针对非营利性的公益网站，但我们相信我们提出的改进建议也会使其它网站受益。
1. 请开始使用谷歌网站站长工具
我们发现，有些网站从未使用过谷歌网站站长工具，也不知道这个工具的方便之处。谷歌网站站长工具能够就网页在Google搜索结果中的可见性为您提供详细的报告。这是一款自动升级的产品，为网站站长提供网站信息、帮助您自行处理多个请求。通过学习，您就可以自行完成许多任务了，比如：查看网站状态，了解您的网站链接，或清除网站上的恶意内容。因此，我们强烈建议您使用这一工具。开始使用前，您只需添加您的网站并进行验证。此外，我们还向您推荐这个视频，直观地介绍了如何使用这种工具，使其发挥类似于SEO（搜索引擎优化）的作用。
2. 改进您的网站标题
如果用户用Google搜索您的网站，他们可能会首先看到您的网站标题。标题是帮助Google和用户了解网站重要内容的最直接的途径。我们建议为网站的所有网页都配备一个实用、说明性强的标题，您可参考我们的帮助页面获取帮助。理想情况下，好的标题应包括机构名称和描述性标签。接下来，我们举部分已提交的网站为例说明：
示例：
1. 机构：橄榄树残疾人交流平台
标题：橄榄树残疾人交流平台
论坛 残疾人就业 残疾人交友、培训、孵化中心 关爱残疾人
2.机构：格桑花西部助学网
标题：格桑花西部助学网 - 格桑花教育救助会官方网站|慈善|结对|1对1|1+1
您可以看到，好的标题应包括机构名称和描述性标签。网站上的每一个网页都是与众不同的，所以应当为不同的网页创建不同的标题，彰显您网站的多元性。而且，这也有助于用户了解此网页与网站中其他网页的不同之处。
3. 重视描述性元标签
网站标题标签与描述性元标签都是帮助提高网站在Google搜索结果中的可见性的简单易行的方法。它们可能会直接影响到您的网站被点击的可能性。不过，我们看到部分网站站长仍未能充分利用这些方法。此前，我们已经发布了一篇博客，讨论如何改进说明性元标签。关于这一点，我们再来看看已经提交的网站中一个很好的例子。
如果未采用描述性元标签，或元标签的内容不具相关性，Google将自动从网站内容中选择页面摘要。请注意，您可以通过多种策略选择页面摘要，因此，您的元标签描述最好内容丰富、真实可靠、与网站内容统一。
4. 充分发挥h元素的作用
查看网页的标题是Google搜索引擎算法确定网页内容的方法之一，它能帮助我们了解网页内容的优先属性。
标题中的h元素让Google和用户快速了解您的机构和网站上面的重要信息。对于Google和用户而言，h元素编号越低，文本越重要，所以请充分利用 h1 标签的作用。即使您不了解 h1 标签的视觉渲染方式，您也可以改变它在您的CSS中的外观。
5. 在图像中使用alt文本
我们发现，许多公益网站都喜欢展示图片，但大部分网站都未能恰当地利用图像的alt属性。如果运用得当，这种属性不仅能够帮助Google理解您的图片，还可以帮助那些使用文本格式浏览器、访问受限或使用受限设备的用户理解您的图片。
请注意，如果您打算展示多幅图片，网速也有可能受到影响。此时恰当地运用alt属性将发挥重要的作用。理想的alt文本应当内容丰富，说明性强。
6. 告诉Google是否抓取：网站地图与robots.txt
在这次活动中，我们发现大部分已提交的网站都没有提供网站地图。创建并提交网站地图有助于确保Google了解您网站上的所有网页，包括那些可能不会被Google普通抓取流程发现的URL。就像我们建议您按照逻辑方式组织网页一样，以逻辑方式组织整个网站结构也同样重要，尤其是在必要情况下，提供站内相关文档的链接。
另一方面，许多公益机构都会涉及一些重要信息。针对这一问题，您可以创建一个适当的robots.txt文件，告诉Google搜索引擎不抓取这部分内容。
7. www 还是非www？
这是我们在已经提交的网站中发现的另外一个问题。对于有些网站，加了www就能正常运作，但是去掉www就无法打开。在这种情况下，我们建议您使用301重定向功能指向您的首选域名。您可以查看使用网站站长工具设置首选域的相关功能。
8. 使用正确的HTTP结果代码
另外一种常见的问题是很多网页返回错误的HTTP结果代码。有些网站的错误网页没有返回HTTP结果代码404，而返回了HTTP成功代码200。只有确实可以访问的文档才应该返回HTTP成功结果代码200。如果网页已经不存在，应当返回代码404（表示“该页面不存在”）。您可以使用网站站长工具中的 Googlebot抓取方式功能、Live HTTP Headers Firefox 附加组件等第三方工具或web-sniffer.net查看所有URL的Header回应。
在参加这次活动的网站中，有一家网站由于正在进行网站维护而关闭。下面是这家网站的搜索结果：
是的，如果由于网站维护或出于法律或其它原因，您决定暂时关闭网站，那么您的网站应该返回503 HTTP 结果代码（表示“服务不可用”），以告知搜索引擎：网站是暂时关闭。此外，它还允许网站站长为访问者和抓取机器人提供网站开放并再次运营的大致时间。
9. 用户都喜爱速度快的网站。
我们发现大多数用户非常重视网站速度。如果浏览器需要很长时间才能打开您的网页，有的用户可能不会有耐心等待或浏览您的网站。为此，我们提供多种工具和建议，帮助网站站长了解并优化网站的性能。最简单的入门方法就是使用Page Speed Online，还有大受欢迎的网络版Page Speed Chrome扩展。我们还拥有大量来自Google和其他网站的资源，可帮助加快您的网站速度，我们建议您阅读这篇文章。
另外，您还需要确保用户能够轻松、迅速地找到您的联系信息/志愿者/支持服务的信息。这次我们试图与部分已提交的网站取得联系，但我们发现需要很长时间才能找到他们的联系信息，所以要切记将此类内容置于主域名的醒目位置。
感谢所有提交网站参加这次活动的非营利机构！你们的辛勤工作使我们的世界变得更美好。我们很高兴能够为您提供帮助，并且希望这些建议和帮助能够使您受益。如果各位站长还有关于网站排名和收录的其它问题，请登录我们的网站管理员帮助论坛，提出您的问题与反馈。
最后祝大家春节快乐！
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2:11
Publishing to CometD Bayeux Channel from inside the Oracle Database – PL/SQL based push to CometD Web Client
» AMIS Technology blogIn recent articles, I have introduced CometD as framework for Server to Client and Client to Client Push: Running CometD 2 examples – locally on Tomcat using Maven and NetBeans http://technology.amis.nl/blog/14709/running-cometd-2-examples-locally-on-tomcat-using-maven-and-netbeans, CometD 2 Java Client Sample – open project in NetBeans based on Maven pom file, modify sources and run Java Based Comet Client (http://technology.amis.nl/blog/14720/cometd-2-java-client-sample-open-project-in-netbeans-based-on-maven-pom-file-modify-sources-and-run-java-based-comet-client) [...]
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0:52
中国动画创始人万氏兄弟诞辰112周年！
» Google 黑板报 -- Google 中国的博客网志万籁鸣，万古蟾出生于1900年1月18日，他们是中国动画的创始人，共同制作了建国后第一部大型动画电影《大闹天宫》，并且获得了很多国际奖项。 Google和上海美术电影制片厂共同制作互动动画Doodle，以纪念这两位伟大的美术片开拓者。
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0:43
Sharing session state between JEE web application through WebLogic session descriptor of sharing-enabled
» AMIS Technology blogSession state in Java Web application is associated with a single (user) browser session on the one hand and typically with a specific web application on the other (server side) hand. Session state is created and maintained in the context of a usually a single web application. However… We ran into a situation where our web [...]
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7:37
向您介绍智能手机Googlebot-Mobile
» Google 黑板报 -- Google 中国的博客网志发表者：Yoshikiyo Kato，软件工程师
原文：Introducing smartphone Googlebot-Mobile
转载自：谷歌中文网站管理员博客
发布时间：2012年1月16日 上午 10:21:00
随着智能手机的快速普及，我们发现越来越多的网站正在为用户提供专供智能手机浏览的内容。现在，我们高兴地宣布，除此前的传统手机用户代理之外，Googlebot-Mobile现在也可以通过智能手机用户代理进行搜索。这项改进旨在提高我们对智能手机内容的覆盖率，并为智能手机用户提供更好的搜索体验。
以下是Googlebot-Mobile目前采用的主要用户代理字符串：
• 传统手机Googlebot-Mobile：
o SAMSUNG-SGH-E250/1.0 Profile/MIDP-2.0 Configuration/CLDC-1.1
UP.Browser/6.2.3.3.c.1.101 (GUI) MMP/2.0 (compatible; Googlebot-Mobile/2.1;
+http://www.google.com/bot.html)
o DoCoMo/2.0 N905i(c100;TB;W24H16) (compatible; Googlebot-Mobile/2.1;
+http://www.google.com/bot.html)
• 智能手机Googlebot-Mobile：
o Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_1 like Mac OS X; en-us)
AppleWebKit/532.9 (KHTML, like Gecko) Version/4.0.5 Mobile/8B117
Safari/6531.22.7 (compatible; Googlebot-Mobile/2.1;
+http://www.google.com/bot.html)
智能手机网页抓取工具Googlebot-Mobile抓取的内容将主要用于改进移动用户的搜索体验。例如，新的网页抓取工具可能会发现专为智能手机浏览而优化设计的内容和目录。
我们推出的又一项新功能是重定向到为智能手机优化的网页。如果我们在搜索结果中发现，一个URL会将智能手机用户引向服务于智能手机优化内容的其它URL，我们将改变搜索结果中显示的链接，直接指向最终URL。这种功能消除了重定向带来了延迟，为用户节省了约0.5 - 1秒的网页访问时间。
所有Googlebot-Mobile用户代理都将自己定位为特定类型的移动端, 因此请采用与处理手机用户代理同样的方式处理Googlebot-Mobile请求。除了我们今天更新的有关智能手机的内容外，我们在上一篇博客中讨论的其他指南的详细内容仍然适用。如果您的网站设置认为Googlebot-Mobile只搜索传统手机用户代理，那么我们强烈建议您查看本策略，根据Googlebot-Mobile的用户代理提供相应的内容，以使您的内容对于传统手机和智能手机都能得到适当索引。
如有其他问题，请通过我们的网站管理员帮助论坛提出。
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0:52
Using custom functions in EL expressions in JSF 1.x
» AMIS Technology blogEL expressions are one of the main driving forces for JavaServer Faces. Most dynamic characteristics of pages and widgets are governed by EL expressions. In JSF 1.x, there are some limitations for EL expressions that can at times be a little frustrating. One of the limitations is the fact that no custom functions or operators [...] -
0:39
Retrieve song lyrics in Java using Screenscraping with JSoup
» AMIS Technology blogLast year I wrote about JSoup, a Java library that helps with screenscraping: Screenscraping from Java using jsoup – effective data gathering from websites (http://technology.amis.nl/blog/13121/screenscraping-from-java-using-jsoup-effective-data-gathering-from-websites). Last month I had another opportunity for using JSoup, this time to gather song lyrics for the songs on a CD. The context in this case was the internal SOA [...] -
5:05
Using Java to create a report with the JasperReport java API
» AMIS Technology blogIn this blog I will describe how to create a Report with JasperReport in Java. For this purpose I have used the Communitie edition of iReport. This edition contains besides JasperReport also iReport. iReport is a report designer for JasperReport. You can download it from http://jasperforge.org/projects/ireport After installation I started iReport to design a report. I [...] -
2:10
Stand-alone Java Client for jWebSocket Server – communicating from Java Client to Web Clients and vice versa over WebSockets
» AMIS Technology blogIn a previous article, I have discussed the open source jWebSocket Server and a simple installation and configuration (http://technology.amis.nl/blog/14940/first-steps-with-jwebsocket-open-source-java-framework-for-websockets-installation-and-running-samples). Subsequently, I have shown the implementation of a web client for a synchronized Slideshow application, where WebSocket communication is used to perform Client 2 Client push (http://technology.amis.nl/blog/14949/push-based-synchronized-slideshow-web-application-implemented-using-websockets-and-jwebsocket-server-the-open-source-java-websocket-server). In a third article I have explained how jWebSocket [...]
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3:32
FreeBSD 9.0-RELEASE Available
» FreeBSD Project NewsFreeBSD 9.0-RELEASE Available
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2:32
Implementing a Java Server Side component for jWebSocket Server for WebSocket interaction with Web Clients
» AMIS Technology blogIn a previous post – http://technology.amis.nl/blog/14949/push-based-synchronized-slideshow-web-application-implemented-using-websockets-and-jwebsocket-server-the-open-source-java-websocket-server – I discussed the implementation of the synchronized slideshow application using Web (HTML/JavaScript) clients and jWebSocket as websocket server. In an earlier article, I described the same for the Kaazing WebSocket server – http://technology.amis.nl/blog/14777/push-based-synchronized-slideshow-web-application-implemented-using-websockets-and-kaazing-websocket-gateway – and both stories are (fortunately) fairly similar. In the Kaazing article I also described [...]
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2012年1月书友会暂停通知
» UCDChina.com因为接近放假都在忙，预祝大家春节快乐。
转载请注明出自UCDChina.com，谢谢。
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1:08
第二届“Google Android 应用开发中国大学生挑战赛”圆满落幕
» Google 黑板报 -- Google 中国的博客网志2012年1月12日，第二届“Google（谷歌）Android应用开发中国大学生挑战赛”颁奖典礼在北京举行。截 至2011年12月比赛结束，共收到来自300多所高校的在校大学生提交的1380多件参赛作品。最终，来自天津大学的参赛团队以一款基于Android 的学习绘图教程软件获得全国总冠军；有15项作品分获二、三等奖，另有38项作品获得优秀奖和1项作品获得网络公投最佳人气奖。参赛作品具体详情，请点击这里。
秉承2010 年该项大赛启动时的宗旨，此项赛事为对Android应用开发感兴趣的中国大学生提供了一个学习和分享的平台，同时也积极配合了培养手机移动应用开发人才 的产业需求。2011年，Google和280多所高校建立Android学术合作计划，通过师资培训、创新项目资助等形式协助进行移动应用开发课程建设 和人才培养工作。2010年，Google与包括清华大学、浙江大学、中山大学和同济大学等22所高校开展了Android实验室捐赠项目。这些项目的顺 利实施，为中国高校逐步建立其智能手机移动应用开发课程体系，培养更多符合产业发展要求的移动应用开发人才打下了扎实的基础。
目前，全球每天Android手机的激活量已达70万台。Android应用商店2009年成立至今，Android应用的累计下载量已经超过100亿次。 Google将继续投入资源深入推动Android学术合作计划，协助有基础的高校培养符合产业需求的人才。此外，还将投入资源，计划支持更多高职高专院 校引入Android移动应用开发这一热门技术，协助进行课程体系建设和人才培养工作。
您可以点击这里，获得更多信息。
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0:41
Push-based synchronized slideshow web application – implemented using WebSockets and jWebSocket server – the open source Java WebSocket server
» AMIS Technology blogIn a recent article, I have introduced jWebSocket – an open source Java based server for WebSocket communication: http://technology.amis.nl/blog/14940/first-steps-with-jwebsocket-open-source-java-framework-for-websockets-installation-and-running-samples. In this article, I have described how to download and install the jWebSocket server and how to get going with running some of the distributed samples. In another recent article, I looked at the implementation of a [...] -
4:03
First steps with jWebSocket – open source Java framework for WebSockets – installation and running samples
» AMIS Technology blogThis month, In have been delving into Push architectures for the Web, looking into WebSockets among several other things. WebSockets, a fairly new standard (!) evolved along with HTML 5, specifies a communication protocol that provides an alternative to classic HTTP communication. WebSocket based interaction has lower overhead and – more importantly – is bi-directional [...]
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23:38
手写比打字更便捷
» Google 黑板报 -- Google 中国的博客网志发表者：丹尼尔•科塞斯（Daniel Keysers），软件工程师
原文：Sometimes it’s easier just to write it
Google翻译（Google Translate）Android版最近进行了更新，增加了一项重要的新功能——触屏手写功能，允许用户直接在触屏上写出短语。
或许你想输入一个“森”字，但是手机上没有安装中文输入法该怎么办？那就试一下手写功能吧
!
我们的目标是打破语言障碍、 随时随地输入、帮助你轻松获取你想要的信息。通过在Android应用程序中加入手写输入功能，我们希望能帮助你更快速、更轻松地完成翻译工作。有时候，你不知该如何表述需要翻译的内容；有时候，你可能无法键入；那么，手写就可能成为你的首选输入方式了。触屏手写输入功能作为另一种自然输入法，弥补了键盘、麦克风或相机的某些功能上的不足。
这一功能仍然处于试验阶段。目前支持中文、日语、英语、法语、意大利语、德语和西班牙语（目前只支持中文和日语的单字符输入）。与语音识别和Google翻译一样，我们的手写识别也采用云技术。未来，我们还会不断改进，提高精确性，使您无需下载新版本的应用程序就可使用。
您可以在Android Market下载Google翻译，该应用支持Android 1.5及以上版本的手机和平板电脑。
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Obama's Push to Digitize Health Care Boosts Startups
» BusinessWeek Online -- Tech BeatBy Ari Levy
President Barack Obama's effort to bring the health-care system into the digital age is boosting a couple of software startups -- ZocDoc and Practice Fusion -- that are trying to do just that.
ZocDoc, which lets patients book medical appointments via the web, said today that former Senate Majority Leaders Tom Daschle and Bill Frist have joined the advisory board to help the New York City-based company expand.
Practice Fusion, meanwhile, announced today it raised $2 million in debt from a group of angel investors, following a $23 million round of financing last year. Physicians use Practice Fusion's software to track their patients' medical history, schedule appointments, prescribe medication and provide referral letters.
While companies big and small have spent years trying to crack the electronic medical records market, it was President Obama's 2009 economic stimulus plan that sped up the process. As part of the plan, the government will invest up to $27.4 billion by 2021 to get health organizations on board.
ZocDoc is taking a bipartisan approach. Frist, a former heart and lung transplant surgeon, is a Republican and served as his party's leader in the Senate. Daschle led the Democrats in the Senate and now works at law firm DLA Piper, where he provides advice to clients on health care.
"They know a lot about the existing health-care establishment," said ZocDoc Chief Executive Officer Cyrus Massoumi. "Having people who have spent time at the highest level fixing the U.S. health-care system will help us leverage what we've done."
ZocDoc, founded in 2007, is used by about 800,000 people. The site lets users search for physicians in a particular practice and city and book the appointment online, rather than having to call around. Doctors pay $250 per month for the system, which is free for patients.
Practice Fusion, which opened its doors two years earlier, says its service for storing data is used by more than 130,000 medical professionals serving 29 million patients. The system is free for all users, and the San Francisco-based company currently generates all of its revenue from advertising on the site.
Venture capitalists and other investors have poured a combined $133 million into the companies, and there's plenty of overlap. Peter Thiel's Founders Fund and Ron Conway's SV Angel are investors in both. Salesforce.com CEO Marc Benioff backed ZocDoc, while his company is an investor in Practice Fusion.
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1:46
纪念丹麦地质学家Nicolas Steno 374周年诞辰
» Google 黑板报 -- Google 中国的博客网志Nicolas Steno (Niels Stensen，1638年1月11日-1686年11月25日)，丹麦解剖学与地质学的先驱，被认为是地质学与地层学之父。他于1659 年决定不轻易接受书本中所写的任何结论，而要亲自研究得出。Google今天发布别具一格的涂鸦，纪念这位伟大的地质学家374周年诞辰。
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0:26
First steps with Java Embedding in Oracle SOA Suite 11g BPEL 2.0 – useful API calls
» AMIS Technology blogWhile preparing for the next session in our internal SOA for Java Professionals training program on BPEL, I revisited the BPEL activity Java Embedding that allows us to enrich a BPEL process with custom, Java based functionality. I tried to determine how best to explain, present and demonstrate this activity to my colleagues. This article [...] -
1:32
Introduction of BPEL 2.0 forEach activity – valuable loop and standard based successor to FlowN
» AMIS Technology blogBPEL 2.0 introduced the forEach activity – similar to for [-loop] found in many programming languages. Oracle SOA Suite 11g adopted BPEL 2.0, first in run time (PS2) and later in Design Time (JDeveloper) as well (PS3 an beyond). For BPEL processes created using BPEL 2.0, forEach is a looping mechanism – similar to repeatUntil [...]
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BI Publisher January patch for 11.1.1.5.0
» Oracle BI Publisher BlogThe BI Publisher January patch for 11.1.1.5.0 is now available on Metalink; look for patch 13554951. Thanks to Shinji and team, this is one of the easiest posts of the year so far :0) Contents of the readme below, enjoy!
One-off patch for Oracle Business Intelligence Publisher 11.1.1.5.0 READ ME File ==================================================
This patch contains fixes of following bugs for Oracle Business Intelligence Publisher 11.1.1.5.0.9102877 - QA: QUERY BUILDER GENERATES INCORRECT SQL FOR MANY DBS 10071370 - IF 'USE SECURE FTP' IS CHECKD ON ADMIN PAGE, ITS SERVER IS NOT LISTD WHEN SCHED 10402890 - SETTINGS FROM "DELIVERY CONFIGURATION" PAGE NOT BEING HONORED WHEN REPORTS RUN 11725468 - ER: RTE HTML SUPPORT IN DATA XML 11828672 - QA: INCORRECT INACTIVE WARNING MESSAGE 11835845 - 11G SQL DATA SET CREATION ORA-01756 ERROR BECAUSE COLON IS READ AS BIND VARIABLE 11850902 - SHARE REPORT LINK "NO PARAMETERS" AND "DOCUMENT ONLY" RENDER INCORRECTLY 11870449 - BI PUBLISHER XDOXSLT:SDIV() FUNCTION RESULTS NOT CORRECT 12312539 - QA: REPORT VIEWER SCREEN FREEZES FOR A FLEX REPORT WHEN SESSION EXPIRES 12376386 - REMOVETEMPLATEFORREPORT API DOESN'T REMOVE TEMPLATE 12405904 - CANNOT DEPLOY BIP WHEN DEPLOYMENT PATH INCLUDES SPACE CHARACTERS 12406034 - CANNOT USE JAVA DB - DERBY - FOR SCHEDULER DATABASE 12570248 - PROJECTS : -GENERATE REV/INV PROCESS ERRORING OUT 12588342 - DELETEOBJECT RANDOM FAILURE 12595931 - WHEN PRINTING CHARTS TO PDF, NUMBERS BECOME ARABIC NUMBERS 12615821 - MISSING MEMBERS ON THE XML GENERATED BY BIP 12634030 - RE-PACKAGING MLR#11893189 TO XDOPARSER11G.JAR 12646493 - ORA-22902 CURSOR EXPRESSION NOT ALLOWED 12666066 - ER: EXCEL 2007 SUPPORT IN REST API 12705244 - JOINED MDX DATA SETS DO NOT PRODUCE CORRECT DATA - DATA MISSING 12726163 - NUMBER OF SESSIONS INCREASES AFTER RUNNING SCHEDULED JOBS 12737670 - GROUP BY FOR MDX DATA SET MISSING IN 11.1.1.5 - WAS PRESENT IN 11.1.1.3 12741858 - BI ASNWERS ANALYSIS IMPLEMENTING CASE WHEN STATEMENTS CAN NOT BE CONSUMED IN BIP 12750192 - ER: GENERATE NATIVE COMBINATION DUAL Y GRAPH IN PPTX OUTPUT FROM RTF AND XPT 12766932 - VERTICAL DUAL Y COMBO CHART MISSING SETTINGS TO ASSIGN VALUES TO AXIS 12775400 - DBFW:GENERATING IN XLXS OUTPUT IS THROWING AN ERROR 12822514 - SQL WITH CLAUSE - DATASET DOESN'T WORK (AND DIAGNOSTIC ISN'T HELPFUL) 12828845 - ISSUE WITH XDO_USER_NAME PARAMETER ON BIP 11.1.1.5.0 12835431 - INTRANSIT VALUATION REPORT QUERY GIVING ERROR IN EDITOR 12847306 - BI PUBLISHER DATA SET - WON'T SAVE 12872831 - EXCEL TEMPLATES GENERATING INCORRECT RESULTS FROM NESTED GROUPS 12879801 - ALLOW SAVING DATA MODEL WITH SPECIAL CHARACTER 12945367 - NOT ABLE TO EDIT DATA MODEL WHEN LINKS EXIT AMONG DATA SETS 12945475 - IE: NOT ABLE TO EDIT DATA MODEL WITH MANY DATA SET AND LINKS 12956901 - IN SQL SERVER CLOB IN DATA MODEL UI MARKED AS STRING DATA TYPE 12956915 - INCORRECT DATA WHEN PROCESSING OF CLOB COLUMNS FOR SQLSERVER 12956934 - DATA MODEL SHOULD RESPECT CASE SENSITIVITY FOR COLUMN AND TABLE NAMES 12972559 - XML DATA FILE TRUNCATED 12972852 - DYNAMIC IMAGES BROKEN FOR FO/PDF 12989467 - NEED TO CONVERT DOCUMENT FORMAT "EXCEL" TO "EXCEL2000" 13005659 - PSR:PERF:BIP:POOR PERF ACCESSING CATALOG FOLDER IN BIP 11G WITH SECURITY ENABLED 13007341 - DISPLAY ISSUES IN PARAMETER TAB OF OBI PUBLISHER 11G 13095050 - STRESS: OUTOFMEMORY ERRORS WITH VIEW REPORT STRESS 13100021 - BI PUBLISHER: QUERY BUILDER RESULTS RETURN COLUMN TYPE (APPEARS) INSTEAD VALUE 13100220 - HOW TO USE 11.1.1.5 WITH THE IDENTITY ASSERTER 13250009 - FOR METADATA LOGICAL SQL BIND WITH DUMMY VALUES INSTEAD OF NULL 13321449 - RESOURCELIMITEXCEPTION DURING ANY OPS THAT USE JNDI DATA SOURCE 13346737 - MULTIPLE VALUES IN A DASHBOARD PROMPT DOESN'T WORK WITH BI PUBLISHER INTEGRATED 13351305 - QUERY BUILDER DOES NOT BUILD CORRECT SYNTAX FOR SQL SERVER 13393658 - PRINTER DELIVERY [0] STATUS: FAILED PRINTING FROM WEB SERVICE CALL FROM EXTERNAL 13421264 - ADDING PARAMETER TO SQL BI SERVER DATA SET CORRUPTS DATA MODEL 13481659 - CAN'T SAVE ON BI DEV ENV RC2 13501838 - ORA-00923 ISSUE WHEN CREATING A BI PUBLISHER DATASET 13521951 - BIP UPGRADE FROM 10G TO 11.1.1.5.0 IS NOT SUCCESSFULL FOR TIAA-CREF 13529494 - BI REPORT NOT GENERATED WHEN HTML CONTAINS INVALID ATTRIBUTES
----------------------------- INSTALLATION FOR ENTERPRISE -----------------------------
1. Login to BI Domain Weblogic Administration Console.
2. Find the location of the "bipublisher" application.
3. Stop the bipublisher application.
4. Open a terminal and go to the directory.
5. Back up the existing xmlpserver.ear to xmlpserver.ear.org.
6. Copy new xmlpserver.ear from this patch.
7. In Admin Console, select "Lock & Edit".
8. Select the application "bipublisher" and "Update".
9. Leave all options same and proceed to Finish.
10. Select "Activate Changes".
11. Start the bipublisher application.
------------------------- MDX Query Limitation -------------------------
Joins of two MDX queries on a dimension that uses a MDX function in the Select Clause that requires the stipulation of the same dimension, such as Intersect, MemberRange, Union are not supported. Example)SELECT NON EMPTY Hierarchize([Product].Generations(3).Members) ON Axis(0), Hierarchize(Union([Market].Generations(3).Members, [Market].Generations(4).Members, ALL)) ON Axis(1) FROM Demo.Basic
It should be written using a With Set member:with set [UnionMarket] as '{Union([Market].Generations(3).Members, [Market].Generations(4).Members, ALL)}' SELECT NON EMPTY Hierarchize([Product].Generations(3).Members) ON Axis(0), Hierarchize(([UnionMarket]) ON Axis(1) FROM Demo.BasicThis MDX set is recreated for the Join clause to:with set [UnionMarket] as '{Union([Market].Generations(3).Members, [Market].Generations(4).Members, ALL)}' SELECT NON EMPTY Hierarchize([Product].Generations(3).Members) ON Axis(0), Hierarchize(Filter([UnionMarket], [Market].CurrentMember.Member_Name = "Boston")) ON Axis(1) FROM Demo.Basic----------------------------------------- Query Builder limitation with Microsoft SQL Server -----------------------------------------
Query Builder doesn't support a cross join that does not have a WHERE clause and produces the Cartesian product of the tables involved in the join. The size of a Cartesian product result set of such join is the number of rows in the first table multiplied by the number of rows in the second table. A cross join has a very limited use in everyday data retrieval.
----------------------------- HTML text support in XML -----------------------------
This patch supports HTML embedded in XML. The following new layout command is added to retain HTML format from data in the final output. <?html2fo: xpath?> Example: html code in xml data: user should input the html code to xml data file as CDATA. sample, html code is embedded in field RTECODE.
<?xml version="1.0" encoding="UTF-8"?> <RTECODE> <![CDATA[ <font style="font-style: italic; font-weight: bold;" size="3"><a href="http://www.oracle.com">oracle</a></font> <br/> <font size="6"><a href="www.oracle.com">www.oracle.com</a></font><br/><br/> ]]> </RTECODE>
Sample usage in rtf template (assume the data.xml is as above).<?html2fo:RTECODE?>
Supported html formats: Paragraph Font style ( bold, italic, plain, underline, subscript, superscript and strikes-through) Font size Font family Background color Foreground color Paragraph alignment (center, left, right and justify) Paragraph indent URL link List Bullet List Number List Non-Supported formats: Nested List (List with Indent) Some HTML tags/attributes which manually inserted like Table, Image, etc... in stead of HTML editor Sample Report: XML: html_test.xml RTF tempalte: html_test.rtf
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2:58
Push based synchronized Slideshow demo application implemented using CometD and jQuery running on Tomcat
» AMIS Technology blogIn a string of recent articles, I have discussed downloading, installing and running demos for a number of different tools, frameworks and libraries that support push-style (web) applications in one way or another. I have looked into ‘classic’ comet with Grizzly, Atmosphere and CometD as well as ADF Active Data Service and WebLogic Pub/Sub (Bayeux) [...] -
23:36
Get going with Kaazing WebSocket Gateway – HTML5 Edition – installing locally and running demos
» AMIS Technology blogMy last few articles on this blog site have all dealt with push architecture and technology in some way. This is an area that I have been investigating into quite bit recently. Part of these investigations had to be of course Kaazing, a specialized commercial offering, specifcally around WebSockets and its application in new HTML [...] -
21:32
Push-based synchronized slideshow web application – implemented using WebSockets and Kaazing WebSocket Gateway
» AMIS Technology blogIn the last few articles, I have discussed downloading, installing and running demos for a number of different tools, frameworks and libraries that support push-style (web) applications in one way or another. I have looked into ‘classic’ comet with Grizzly, Atmosphere and CometD as well as ADF Active Data Service and WebLogic Pub/Sub (Bayeux) Channels. [...]
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16:15
美国漫画大师查尔斯·亚当斯诞辰 100 周年
» Google 黑板报 -- Google 中国的博客网志Google发布Doodle纪念美国漫画大师查尔斯·亚当斯 100 周年诞辰，他的代表作《亚当斯一家》广为人知。
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1:11
NetBeans 7.1 – JavaFX 2.0 support, refactoring enhancements and great Maven 3 integration
» AMIS Technology blogNetBeans 7.1 has just been released. It is interesting how NetBeans continues to evolve – after many doubts were raised with regard to its future after the Oracle-Sun acquisition. Oracle maintains two IDEs – each with its own objectives. JDeveloper to support Fusion Middleware development, NetBeans to propel the Java platform and its associates (Groovy/Grails, [...] -
2:36
Getting Atmosphere – framework for Comet style communication – up and a first sample running on Tomcat
» AMIS Technology blogOver the past weeks, I have been dabbling in Comet style, push-based, asynchronous communication enabling frameworks and libraries – including CometD, Atmosphere, Kaazing, jWebSocket, Grizzly and others. This short article will describe how I went about setting up Atmosphere on my local environment to the point that I could successfully run at least one of [...] -
1:15
Business Validation in Oracle SOA Suite 11g using Schematron
» AMIS Technology blogIn a previous post I’ve explained the Schematron standard, how it works and how to use it. In the Oracle SOA Suite you can ‘Validate Semantic’ on the input (request) of a routing rule in a Mediator component by selecting a Schematron file. This is the Schemtron xml file in which you define your validation [...] -
1:37
CometD 2 Java Client Sample – open project in NetBeans based on Maven pom file, modify sources and run Java Based Comet Client
» AMIS Technology blogOn the heels of previous articles that described setting up NetBeans (http://technology.amis.nl/blog/14661/first-experiences-and-getting-started-with-glassfish-3-1-and-netbeans-7-x-its-a-breeze), Tomcat 7 (http://technology.amis.nl/blog/14688/installing-tomcat-7-and-configuring-as-server-in-netbeans) and the CometD 2 environment (http://technology.amis.nl/blog/14709/running-cometd-2-examples-locally-on-tomcat-using-maven-and-netbeans), this article describes how I opened the Java Client Examples from the CometD project in NetBeans (creating a NetBeans project based on the Maven pom.xml included in the CometD distribution), made a few changes [...] -
23:57
Running CometD 2 examples – locally on Tomcat using Maven and NetBeans
» AMIS Technology blogPush technologies is an area of interest to me. I have been looking into frameworks, servers and libraries such as Atmosphere, ADF ADS, CometD 2, Kaazing, jWebSockets, Grizzly and others. In my experience, even though there is a lot of information to be found through Google, it is not simple to quickly gain a good [...]
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Ellison’s son is an Oracle of movie hits
» Oracle Professional
When “Mission: Impossible — Ghost Protocol” topped the box office last weekend, it was a surprising outcome to many.
But for the 28-year-old son of Oracle CEO Larry Ellison, the film’s success was a vindication of his early support for the project that led him to finance half of its $145 million budget.
The latest “Mission: Impossible” film is just one of several movies being co-financed by Paramount and Skydance, the production and financing company started by Larry Ellison’s son, David.
Skydance gives Paramount a way to share the risk on big-budget films or movies with uncertain commercial prospects.
When Skydance finalized its deal with Paramount in 2010, the studio had been without a long-term financing partner since 2008. In the interim, the studio had been relying on various companies like Spyglass.
But Paramount still had a strong track record at the box office, which, along with the fact that the studio seemed to be looking for a strategic partner, appealed to David Ellison.
A source close to the deal says the studio reached an agreement with Ellison in part because execs discovered they and the Oracle scion had very similar tastes.
But another source familiar with the situation indicated that the fact that David was Larry Ellison’s son made Paramount feel like he was a reliable investor.
Indeed, Larry Ellison supplied an undisclosed amount of the $150 million in equity Skydance raised. Skydance also put together $200 million in a revolving -credit facility led by JPMorgan.
Paramount offers films it wants Skydance to co-finance to Ellison’s company early in their development. The percentage of the budget Skydance finances depends on the film.
The partnership has provided Paramount with a way to hedge their bets on risky movies like the Coen brothers’ Western, “True Grit”; Skydance financed 50 percent of its $38 million budget.
More recently, Skydance stepped in to help finance Paramount’s reportedly pricey zombie film, “World War Z.”The deal also gives Paramount an option to distribute movies that Skydance develops.
Source: HILARY LEWIS @ http://www.nypost.com/
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22:15
Installing Tomcat 7 and Configuring as Server in NetBeans
» AMIS Technology blogTomcat 7 is a Servlet Container – a fairly light weight container, very convenient for development and testing. While not a full application server, Tomcat implements the functionality described in the Java Enterprise Edition Web profile specifications. Most notably, it supports version 3.0 of the Servlet API (application programming interface) and version 2.2 of JavaServer [...] -
10:35
Preparing your environment for modern open source Java libraries and frameworks using Git and Maven, throwing in Tomcat as a bonus
» AMIS Technology blogIn my investigations into jWebWSockets, Kaazing, Atmosphere, CometD 2 and other frameworks I came to understand that in order to get these frameworks installed, integrate them into my custom applications or run the samples to go with these products, it would be convenient if not essential to have an environment with Maven and Git operational [...]
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0:09
Google和你一起迎新年
» Google 黑板报 -- Google 中国的博客网志2012年第一个Doodle来了，每个人用各自不同的方式，或弹奏，或演唱，或苦读，迎接新一年的到来。Happy new year！让我们一起来翻开新的一页！
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6:43
给托管服务商和网站管理员的一些建议
» Google 黑板报 -- Google 中国的博客网志发表者：Pierre Far，网站管理员趋势分析专员
原文：Tips for hosting providers and webmasters
转载自：谷歌中文网站管理员博客
发布时间：2011年12月29日 下午 02:22:00
一些网站管理员在论坛上咨询影响他们站点托管的问题，为帮助托管服务商和站长们识别、诊断以及解决这些问题，我们与您分享一些常见的问题及解决方法。
• 拦截Googlebot 抓取功能。这是一个非常普遍的问题，通常因防火墙配置错误或DoS保护系统所致，有时也因站点运行的内容管理系统所致。保护系统是形成好的托管服务的重要组成部分，通过配置来拦截异常的服务器频繁的请求，但有时也可自动完成。然而Googlebot通常会执行比个人用户更多的请求，所以这些保护系统也会决定拦截Googlebot，并阻止其抓取您的网站。如需查验此类问题，您可以使用网站管理员工具中的Googlebot抓取方式功能，并查看网站管理员工具显示的其它抓取错误。
我们向那些希望更有效地控制Googlebot抓取功能并提高抓取效率的网站管理员和托管服务商提供了几个工具：
o 我们就如何使用拒绝googlebot协议和配置 URL 参数来控制“Googlebot抓取方式”功能提供了详细的帮助。
o 如果您担心使用Googlebot的代理程序，我们提供了一个方法来验证该抓取工具是否为Googlebot。
o 如果您想改变Googlebot抓取您的站点的频率，您可在网站管理员工具中验证您的网站，并且改变Googlebot的抓取速度。托管服务商也可验证他们IP地址的所有权。
更多信息请查询抓取和索引FAQ。
• 可用性问题。我们常见的另一类问题是当Googlebot (及用户)试图访问站点时，网站无法浏览。这通常是由DNS问题、服务器过载引起的超时和拒绝链接问题、错误的内容分发网络配置(CDNs)、以及很多其它类型的错误造成的。当Googlebot遇到这些问题时，我们将之视为网址无法访问错误或抓取错误并在网站管理员工具中报告该错误。
• 无效SSL证书。要想SSL证书对您的网站生效，必须将它们与站点名称相匹配。常见问题包括过期的SSL证书，以及因服务器上所有网站使用同一个证书而导致的服务器错误配置。在这些情况下，大部分浏览器会试图警告用户，Google则通过网站管理员工具发送一条信息来警告网站管理员。要解决这些问题，就要确保您所使用的SSL证书对所有网站的域名以及您用户访问的子域名都有效。
• 通配符DNS。网站可通过配置来响应所有子域名的请求。例如，example.com的网站可以通过配置用来响应来自foo.example.com，made-up-name.example.com以及所有其它子域名的请求。
在某些情况下，这是网站管理员所希望发生的，例如一个用户生成内容的网站可自行选择给予每个账户各自的子域名。但在某些情况下，网站管理员可能不希望发生这种行为，因为这也许会引起不同的主机名将内容进行不必要的复制，还可能影响Googlebot抓取功能。
若想尽量减少通配符DNS设置中的出现的各种问题，您可以将您的网站设置成不使用它们，或者将您的服务器设置成对不存在的主机名不能成功响应，亦或拒绝连接或直接返回HTTP 404 页面。
• 虚拟主机错误配置。这种问题的特征是同一个服务器上托管的多主机和/或域名总是只返回一个站点的内容。换言之，尽管服务器托管多个站点，但它不管请求内容是什么却只返回一个站点。要诊断此问题，您需要验证服务器是否正确地响应了HTTP 主页面。
• 通过特定的URL托管复制内容。很多主机基于测试/开发的目的，为您的网站提供URL。例如，如果您在托管网站example.com上托管http://a.com/，托管提供商可能会提供如 http://a.example.com/ 或 http://example.com/~a/这样的URL地址来作为您网站的入口。我们建议不要将这些特定的URL托管设置成可被公开访问的状态（通过密码保护它们）；即便这些URL可被访问，我们的算法通常选择网站管理员所想要的URL地址。如果我们的算法选择特定的URL托管，您可通过正确执行规范化技术来对我们的算法做出改动，从而选择您首选的URL。
• 软错误页面。某些托管服务商用HTTP 200状态码（表示“成功”）而不是HTTP错误状态码来显示错误页面。例如，一个出现“页面无法访问”字样的错误页面可能会返回HTTP 200而不是404，从而造成软404页面；一条“网站暂时无法访问”信息返回的可能是HTTP 200，而不是正确地返回503HTTP状态码。我们努力检测软错误页面，但当我们的算法无法检测出主机软错误页面时，这些页面的错误内容可能被列入索引，导致分级或跨域选择网址的问题。
检测返回的状态码很简单：只需采用任一一种工具，如Googlebot抓取方式，查看服务器返回的HTTP页面。如果一个错误页面返回的是HTTP 200，那么我们可以改变配置使其返回正确的HTTP错误状态码。同样，请留意网站管理员工具软404报告中有关抓取错误页面的诊断方法。
• 内容修改和框架（frames）。网站管理员可能惊讶于看到页面内容被托管服务商修改，尤其是在页面插入脚本或图片。除此之外，主机还可能通过使用frames或iframe将内容嵌入其它页面来托管内容。如果想查看主机是否以您意料之外的方式修改您的内容，只需查看主机托管页面的源代码，并将其与您上传的代码进行比较。
请注意某些服务器端代码的修改可能非常有用。例如，一个使用Google Apache加速模块或其它工具的服务器可能会压缩代码来优化页面载入速度。
• 垃圾信息和恶意软件。我们经常看见有部分主机和大量子域名服务成为恶意软件和垃圾邮件的主要来源，鉴于此，我们进行一些细微的操作来保护用户和提高搜索质量，但如果我们发现特定的主机上绝大部分站点发送垃圾信息或传播恶意软件时，我们就不得不对整个主机采取行动。为帮您控制恶意软件，我们提供：
o 适用于托管服务商的网络管理员安全浏览警报
o 适用于个人网站的管理员工具的恶意软件通知
o 适用于开发人员的安全浏览API
我们希望以上几点能帮助托管服务商和网站管理员诊断和解决这些问题。除此之外，我们还在质量方面也有所思考，如服务的质量以及支持的有用性。如果您有问题或需要更多帮助，请咨询我们网站管理员帮助论坛。
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4:33
First experiences and getting started with GlassFish 3.1 and NetBeans 7.x – it’s a breeze
» AMIS Technology blogSeveral years back, AMIS selected GlassFish as its preferred Open Source J(2)EE Application Server, over for example JBoss. Some of the criteria at the time were: speed of implementation of new functionality and integration of JEE (being the reference implementatoin), ease of administration, enterprise quality, small yet rapidly growing market share (the band wagon to [...]
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2011年个人总结
» DBA's notes本年度的最后一天，个人惯例，度过元旦的方式是做一下过去一年的个人总结。翻看了一下去年的总结和计划，完成度还过得去，这一年虽有遗憾，但没有虚度。
2011 年中在工作上多少做出了一点成绩，回顾了一下，上半年经历了从业以来几乎是最为严峻的考验，有段时间头发都急白了不少；下半年则相对顺利，团队效率提升很多，项目和产品上到了收获期，我甚至还能有时间顺路做做公关宣传。这是最有效率的一年。如果用一句话总结，那就是：丁香园全站过去一年中从传统的 1.0 模式升级到了 2.0 版本，打通了任督二脉，甚至还有一点延伸 --比如丁香园用药助手。作为第一款试水性的移动应用，一定程度上获得了用户的认可并且在业界有一点反响，这是整个团队乃至我个人都是始料未及的，很欣慰。总体来说，从大公司到小公司落了地，并且还能做点实际的事儿(某些人看这事儿：真是奇迹)，也对自己有了一点信心，「如人饮水，冷暖自知」。
技术团队规模与去年相比，增加了60%。因为自己不喜欢大公司做事方式，己所不欲，勿施于人，所以对团队完全采取采取扁平结构、氛围尽量保持宽松，收效还不错。其实，一个团队负责人如果能充分调动大家的能动性，你会发现身边都是天才。《道德经》中有一句话：功成事遂，百姓皆谓：我自然。这是个值得努力的境界。
经济上，因为机会合适兑现了一些原公司的股票，算是过去几年的加班费吧，能让家里生活质量暂时提高一点点。投资方面，收获不错。投资老同事的项目成功出售，作为小小天使的另一个项目已经拿到风投并进入良性循环期；贝塔咖啡开了两家分店，「无形资产」起码增长了不少 ;) 允许我自我满足一下。尝试炒了一点美股，战绩还行，这个更大的收获还是了解到了一些公司的业务模式，其实也是在学习。顺便说一下，雪球是个有价值的网站。
这一年中，如果要问在那几个地方获取到有价值的信息最多？第一个是曹政大侠的神秘群组，让我了解到一个不一样的互联网生态圈；第二个地方是在知乎，内容质量非常好 ；第三个地方是新浪微博，获取到了很多有价值的产品反馈；然后是 Twitter，这一年发言少了很多。当然，要了解医学和健康知识，那还必须是丁香园，中立、客观是丁香园的准则。
拖延了好久的驾照考试终于通过(refer:学车记)，虽然这事儿说出去挺丢人的，但对我自己来说，起码证明我的执行力终于改进了一点儿，自我满足一下。考过驾照之后出门也不怎么晕车了，伴随我这么多年的老毛病总算有所缓解。今年还有一件值得一提的事情是回到母校参加了毕业十周年的同学聚会，是啊，大学毕业10年了，从业也有10年了，就连我自己的个人站点都存在八年多了，时间真是个可怕的东西，不知道下一个十年会是怎样。我想，我应该抽空再修改一下上半年写的那篇《十年莽撞IT路》，算是一份人生的记忆。
这一年，自己完全变成了一个创业者。心态、思维模式改进了不少，人要改变自己很难，还好我不是不可救药。要批评自己的是在微博上不知不觉的暴露了个性上不那么讨好人的一面，有必要收敛一点。读书方面，阅读量还行，和去年相比不相上下(荐书清单)。参加的会议与往年相比，少了不少，只参加了QCon和移动开发大会等几个会议，全程免费的 Oracle Open World 也没时间去了，不过并不遗憾。Blog 数量少了很多（写邮件倒是多了），一是我不再想重复以前的那些东西，二是质量的确所下降，水分增加了，对读者朋友们说声抱歉! 对了，喝咖啡多了，但是失眠少了；几经折腾之后，开始尝试新的生物制剂药物，关节痛基本控制住了，体重居然也增加了 :)
身边的朋友多多少少对这狗日社会的渐渐有了幻灭感，只要我们相信有些事情会变好的，那不妨就积极的一点点做起来。从你我开始。
家庭生活上，有一点失落，但总有些事情是改变不了的，随遇而安吧。
我的 2011 榜单：
年度致敬：陈光诚 这个社会缺少有勇气的人；
年度媒体：知乎 在这里学到了很多知识，活到老，学到老嘛；
年度图书：吴军大作《浪潮之巅》。候选图书:《黑客与画家》...
年度视频：罗永浩 保利剧院演讲(一个理想主义者的创业故事II）；
年度电影：钢的琴 ，有些生活总是让人感动；
年度音乐：左小祖咒《苦鬼2011》2012 年的 TO-DO List：
Lean Startup. 过去的一年，其实团队做事一定程度上已经暗合 Lean 理念，2012 还要深入实践。如果还用老思路、老方式做事，不想办法做改进的话，成长自然不会好到哪里，所以，需要新思维。PS. 精益创业模式的理念和原则如下：1.创业第一天就设定收入目标 2. 持续的客户互动 3. 如果没有收入，就一定限制规模(别乱花VC的钱) 4.产品开发周期粒度减小：以小时/天计而不是月或者年为单位 5. 产品开发 - 最少的功能，最大的客户覆盖率 6. 客户驱动的产品开发.
产品研发. 如果2012不是世界末日的话，事情还要继续做下去。计划中还至少有两款有意思的产品要推动，要做出来；
运营意识. 毫不客气的说，过去一年中做的产品有几个并不那么成功，这并不都是产品本身的问题，运营能力不足的确存在，技术部门当然也要有运营意识。多和业界同仁学习，实践，还要勤奋一点。
寻觅人才. 丁香园技术团队仍然需要各方面的人才，尤其是移动应用开发的人才，我们有足够的耐心，也有足够的信心。如果你想在浮躁的环境中想静下心来做点对中国人有价值的事情，为什么不联系我一下呢？
好好生活. 新的一年要多出去走走。旅游，2011年两次国外旅游都挺有收获，怀念长滩的芒果沙冰。新的一年争取好好利用一下假期。另外，如果不是生活必需品，尽量少购买。简化一点生活，没什么不好。
最后，祝愿朋友们在新的一年更好的实现个人价值，让自己和家人生活得更好一些。
致谢：曹政、Hawk、召唤、大风、周拓、肖头、云风、Benjurry、Robbin、校长、Bluedavy、Hugo、国平、夏天天...... (不分先后，肯定还有遗漏的朋友，见谅! )，感谢各位朋友们一年来在技术上给我的帮助，让我学到很多很多，感谢!
--EOF--
这里有我的一份针对互联网的 2012 预测，仅供娱乐。
大环境的回顾，看子曰乐队的《2011盘点》吧：
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0:13
Happy New Year!
» Google 黑板报 -- Google 中国的博客网志新年将至，Google今天发布新的Doodle，祝大家新年快乐。
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Oracle Datafiles & Block Device & Parted & Udev
» Chanel [K]需求：
1. 使用裸设备作为Oracle数据文件，而且要跳过操作系统或者其它软件提供的卷管理（比如Linux下的LVM）。
2. 由于small datafile限制，有大量磁盘分区需要创建。以下测试环境操作系统为CentOS 6.0，如果你的操作是RHEL6或者OEL6，也同样适用，如果是RHEL5或者OEL5，那么udev部分的命令是不相同的。但是只需要在操作系统中man udev，查看一下相应的语法即可，思路是相同的。
解决方案：
1. 使用parted命令，脚本式创建多个分区，使用gpt类型分区表，这样可以创建大量primary分区，而如果使用msdos分区，则必须要要创建extend分区，然后再创建logical分区，这样在后面的udev规则文件中，还需要将extend分区排除出去，比较麻烦。在我的测试环境中，对于/dev/sdc磁盘进行操作，分了11个分区，每个50M。
parted -s /dev/sdc mklabel gpt parted -s /dev/sdc unit MB mkpart primary 1 50 parted -s /dev/sdc unit MB mkpart primary 50 100 parted -s /dev/sdc unit MB mkpart primary 100 150 parted -s /dev/sdc unit MB mkpart primary 150 200 parted -s /dev/sdc unit MB mkpart primary 250 300 parted -s /dev/sdc unit MB mkpart primary 300 350 parted -s /dev/sdc unit MB mkpart primary 350 400 parted -s /dev/sdc unit MB mkpart primary 400 450 parted -s /dev/sdc unit MB mkpart primary 450 500 parted -s /dev/sdc unit MB mkpart primary 500 550 parted -s /dev/sdc unit MB mkpart primary 550 600
如果在生产环境的Oracle数据库中，block_size=2K的表空间，单个数据文件最大8G，可以使用：
parted -s /dev/sdc unit GB mkpart primary 1 8
2. 设置udev规则。如何在CentOS 6中设置udev，可以参看我之前的文章 － How to use udev for Oracle ASM in Oracle Linux 6。
vi /etc/udev/rules.d/99-oracle.rules
添加如下行：
KERNEL=="sd?[1-9]", SUBSYSTEM=="block", PROGRAM=="/sbin/scsi_id --whitelisted --replace-whitespace --device=/dev/$name", RESULT=="36000c293bd690056ce6834434765d3f4", NAME="oradisk0$number", SYMLINK="mapper/$name", OWNER="oracle", GROUP="dba", MODE="0660" KERNEL=="sd?1[0-9]", SUBSYSTEM=="block", PROGRAM=="/sbin/scsi_id --whitelisted --replace-whitespace --device=/dev/$name", RESULT=="36000c293bd690056ce6834434765d3f4", NAME="oradisk$number", SYMLINK="mapper/$name", OWNER="oracle", GROUP="dba", MODE="0660"
重启udev服务：
start_udev
然后可以发现/dev/mapper下的链接都成功创建，并且指向规则中定义的块设备名称。
# ls -l /dev/mapper/ total 0 crw-rw----. 1 root root 10, 58 Dec 29 03:29 control lrwxrwxrwx. 1 root root 12 Dec 29 03:29 oradisk01 -> ../oradisk01 lrwxrwxrwx. 1 root root 12 Dec 29 03:29 oradisk02 -> ../oradisk02 lrwxrwxrwx. 1 root root 12 Dec 29 03:29 oradisk03 -> ../oradisk03 lrwxrwxrwx. 1 root root 12 Dec 29 03:29 oradisk04 -> ../oradisk04 lrwxrwxrwx. 1 root root 12 Dec 29 03:29 oradisk05 -> ../oradisk05 lrwxrwxrwx. 1 root root 12 Dec 29 03:29 oradisk06 -> ../oradisk06 lrwxrwxrwx. 1 root root 12 Dec 29 03:29 oradisk07 -> ../oradisk07 lrwxrwxrwx. 1 root root 12 Dec 29 03:29 oradisk08 -> ../oradisk08 lrwxrwxrwx. 1 root root 12 Dec 29 03:29 oradisk09 -> ../oradisk09 lrwxrwxrwx. 1 root root 12 Dec 29 03:29 oradisk10 -> ../oradisk10 lrwxrwxrwx. 1 root root 12 Dec 29 03:29 oradisk11 -> ../oradisk11
注意，此时/dev目录下，sdc1至sdc11设备都不再存在了，但是我们可以通过比较设备的major号和minor号来确认绑定是正确的。
# ls -l /dev/mapper/oradisk01 lrwxrwxrwx. 1 root root 12 Dec 29 03:29 /dev/mapper/oradisk01 -> ../oradisk01 # ls -l /dev/oradisk01 brw-rw----. 1 oracle dba 8, 33 Dec 29 03:29 /dev/oradisk01 # cat /proc/partitions | grep 33 8 33 48128 sdc1
3. 直接使用/dev/mapper/oradisk*作为数据文件
由于在Oracle 10.2.0.2以后，Oracle已经可以用O_DIRECT标志直接打开块设备，而不是像以前版本那样，如果要跳过操作系统缓存直接读写磁盘设备，必须要用使用字符设备。在以前的版本中，因为要使用字符设备，所以才需要用raw命令去将某一个块设备映射为一个裸设备（字符设备）。而在Oracle 10.2.0.2以后则可以直接使用块设备（比如/dev/sdc1，比如udev映射以后的/dev/oradisk01，这些都是块设备），不过，虽然Oracle 10.2.0.2以后，Oracle可以直接读取块设备，但是在Oracle 11g以前，这个特性还不被OUI支持，如果要在OUI中使用，则需要使用符号链接（symbolic links），如我们用udev创建的/dev/mapper/oradisk*。
也就是在Oracle 10.2.0.2以后，Oracle 11g以前，需要使用/dev/mapper/oradisk*这样的符号链接作为数据文件。
在Oracle 11g以后，可以使用符号链接，也可以直接使用/dev/oradisk*作为数据文件。如果你们认为有更优的最佳实践，欢迎讨论。当然我们也可以使用lvm或者Oracle ASM来处理数据文件的存储，这不在本文讨论范围内。
BTW: 一个有趣的bug？在测试中发现，如果在udev创建完符号链接之后，再使用parted来查看链接的分区情况，则会导致链接消失，而映射前的sdc1设备名重新出现。重启udev服务也无法将链接重新创建，但是用parted重新查看sdc1设备，则链接又重新出现，sdc1又重新消失。求解释。
--正常情况下有符号链接 [root@localhost ~]# ls -l /dev/mapper/oradisk01 lrwxrwxrwx. 1 root root 12 Dec 29 03:29 /dev/mapper/oradisk01 -> ../oradisk01 --映射前的sdc1设备是不存在的 [root@localhost ~]# ls -l /dev/sdc1 ls: cannot access /dev/sdc1: No such file or directory --用parted检查链接，或者检查/dev/oradisk01块设备，效果是一样的 [root@localhost ~]# parted /dev/mapper/oradisk01 GNU Parted 2.1 Using /dev/mapper/oradisk01 Welcome to GNU Parted! Type 'help' to view a list of commands. (parted) q --链接消失 [root@localhost ~]# ls -l /dev/mapper/oradisk01 ls: cannot access /dev/mapper/oradisk01: No such file or directory --映射的块设备还在 [root@localhost ~]# ls -l /dev/oradisk01 brw-rw----. 1 oracle dba 8, 33 Dec 29 03:29 /dev/oradisk01 --原先的sdc1设备出现 [root@localhost ~]# ls -l /dev/sdc1 brw-rw----. 1 root disk 8, 33 Dec 29 04:29 /dev/sdc1 --重新用parted检查sdc1 [root@localhost ~]# parted /dev/sdc1 GNU Parted 2.1 Using /dev/sdc1 Welcome to GNU Parted! Type 'help' to view a list of commands. (parted) q --符号链接重新出现 [root@localhost ~]# ls -l /dev/mapper/oradisk01 lrwxrwxrwx. 1 root root 12 Dec 29 04:38 /dev/mapper/oradisk01 -> ../oradisk01 --sdc1重新消失 [root@localhost ~]# ls -l /dev/sdc1 ls: cannot access /dev/sdc1: No such file or directory
Related posts:
- Oracle 10204 RAC with HACMP 5.4 Issue
- Oracle Database Instance Startup Fails With Error ORA-27302 ORA-27301
- How to create ASM filesystem(ACFS) in Oracle 11gR2
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VMware and scsi_id
» Chanel [K]在VMware Fusion中测试Cent OS 6中的udev功能时，发现scsi_id命令无法返回设备的SCSI ID。
# fdisk -l /dev/sdb Disk /dev/sdb: 1073 MB, 1073741824 bytes 255 heads, 63 sectors/track, 130 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Disk /dev/sdb doesn't contain a valid partition table # /sbin/scsi_id --whitelisted --replace-whitespace --device=/dev/sdb
这个问题在Oracle VirtualBox中并不会出现，当然并不是说VirtualBox就比VMware好，作为Mac中的原生app，VMware Fusion确实要比VirtualBox美观，但是在功能上而言，VirtualBox毫不逊色，而且VirtualBox是免费的，所以如果要在自己的台式机或者笔记本中测试虚拟机，仍然强烈推荐使用VirtualBox。
言归正传，如何修改VMware Fusion，让其可以提供正确的设备SCSI ID呢？参考文章是：
The Case of VMware and the missing SCSI ID方法如下：
1. 在虚拟机关闭以后，进入虚拟机的目录2. 用文本编辑器修改vmx文件
$ ls *vmx [ VMplanet ] CentOS 6.0.vmx $ vi "[ VMplanet ] CentOS 6.0.vmx"
3. 在vmx文件中任意位置（通常在最后）添加如下行：
disk.EnableUUID = "TRUE"
4. 重新启动虚拟机，此时可以正确获取SCSI ID
#/sbin/scsi_id --whitelisted --replace-whitespace --device=/dev/sdb 36000c29577b5db74013db535e0155e01
注意：在手工修改完vmx文件以后，如果再进行任何虚拟机的设置，比如添加磁盘，修改网卡类型或者其它的操作，disk.EnableUUID参数又会重置为FALSE，所以每次进行虚拟机设置以后，都需要手工再次修改该参数。当然重启虚拟机，或者虚拟机内Guest操作系统中的任何操作，都不会重置该参数。
Related posts:
- Network setting in VMWare
- OpenSolaris
- How to resolve ORA-15025 when creating ASM diskgroup on Solaris
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9:05
Online Wireframes – a new Cloud service for Dashboard prototyping
» AppsBI : Applications Business IntelligenceWhether you build dashboards using OBIEE, Cognos or SAP Business Objects, it is always a pain to build quick dashboard prototypes to demonstrate users and build project momentum.
Project Momentum is very important in predicting the outcome of your new project proposal.
- How soon can you show your new client
- What can you demonstrate
- What is your process
- How unique and innovative are you
Before the client approaches you for a quote and a POC they have definitely done some internal research and probably installed the basic setup. So why waste time in demonstrating the same packaged OBIEE stuff which your client has already done it by visiting various blogs and updates on the web.
What is so unique that you can demonstrate?
- Build some innovative dashboard design patterns
This is something that will catch your client’s attention among heaps of other consultant companies.
But producing them is time consuming with the toolset itself.
So why not just build some cool wireframes and prototypes and send your unique approach to your potential client?
This is so easy. Just login to https://www.wireframes.org and build your dashboard prototype, add some cool visualization, comments and demonstrate how different your dashboard can be.
For e.g OBIEE is fully web based and using jquery and various plugins it is possible to completely blow the minds of everyone when you demonstrate something so cool done in OBIEE which no one has ever dared to do it till now.
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3:39
听听Google带来的圣诞旋律！
» Google 黑板报 -- Google 中国的博客网志Google在圣诞节又给大家带来惊喜啦！快来看看今天Google的doodle吧！大家可以通过6个颜色的按钮点亮Google六个字母，随着鼠标的点击，整个背景会变成黑色，每个字母的图像就会改变并奏出6个音符。点击完成后，Google会自动奏出《铃儿响叮当》的旋律，6个字母还会随着旋律舞蹈，6个按钮后面出现一个音符的按钮，还有闪亮的彩灯，相当Cool哦！
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Siebel Tips and Tricks
» Oracle BI Publisher BlogGood tidings for the season to all of you. Its been erratic I know but we have stumbled along this year ...
I have been working with Eric, a Siebel sales consultant whiz on the BIP integration. He shared some really useful tips with a Siebel-BIP customer yesterday which I thought were well worth sharing.
Date Formatting
Firstly, some help with formatting dates when you are using a Siebel integration objects to generate the data. Siebel IOs do not generate the XSD date format that BIP needs to let you format dates to your hearts content. Attached are a couple files that provide some examples on how to manipulate dates to get the desired formats. Some are easy to get working and some need a little effort.
MSWord Plugin Testing
Siebel development have shipped some Siebel-BIP functions that are deployed to the server. However, to be able to test them locally on your desktop you need to get the java libraries into your classpath prior to starting MSWord. Here is the code Eric uses for starting Word with the Siebel classes in a batch file. It assumes that the jar files are available locally on the client machine at C:\811DQSSIA\Client\CLASSES. This will make the classes used by some Siebel report templates available to test directly in Word. I have two versions, one for Word 2003 and one for Word 2007.
Word 2003:
echo %1
set _JAVA_OPTIONS=-Xbootclasspath/a:C:\811DQSSIA\Client\CLASSES\SiebelXMLP.jar;C:\811DQSSIA\Client\CLASSES\XMLP.jar;C:\811DQSSIA\Client\CLASSES\Siebel.jar;C:\811DQSSIA\Client\CLASSES\XSLFunctions.jar;C:\811DQSSIA\Client\CLASSES\SiebelCustomXMLP.jar;C:\811DQSSIA\Client\CLASSES\SiebelCustomXMLP_SIA.jar;
"C:\Program Files\Microsoft Office\Office12\Winword.exe" %1
Word 2007:
echo %1
set _JAVA_OPTIONS=-Xbootclasspath/a:C:\811DQSSIA\Client\CLASSES\SiebelXMLP.jar;C:\811DQSSIA\Client\CLASSES\XMLP.jar;C:\811DQSSIA\Client\CLASSES\Siebel.jar;C:\811DQSSIA\Client\CLASSES\XSLFunctions.jar;C:\811DQSSIA\Client\CLASSES\SiebelCustomXMLP.jar;C:\811DQSSIA\Client\CLASSES\SiebelCustomXMLP_SIA.jar;
"C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Microsoft Office\Microsoft Office Word 2007.lnk" %1
Happy Holidays!
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6:07
Difficulties with a more complex Business Rule Engine in Oracle SOA Suite
» AMIS Technology blogIn my previous post I’ve shown how to create a composite in the Oracle SOA Suite with a simple decision table in a Business Rule Engine component. For that post I had used quite a simple data model resulting in a small xml/xsd tree. For our project I wanted to repeat the exercise with the [...]
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1:36
Merry Christmas!
» Google 黑板报 -- Google 中国的博客网志圣诞节将至，Google今日发布了新的Doodle给大家带来节日的祝福，祝愿大家圣诞节快乐!
-
7:27
New committer: Jason Helfman (ports)
» FreeBSD Project NewsNew committer: Jason Helfman (ports)
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8:10
Using the Oracle XMLDB Repository to Automatically Shred Windows Office Documents (Part 1)
» AMIS Technology blogPeople who have attended the UKOUG presentation this year where Mark Drake, Sr. Product Manager XML Technologies / XMLDB, Oracle HQ, and I demonstrated the first principles of the XDB Repository, might have been impressed with its (GEO/KML Spatial, Image EXIF info) capabilities combined with Google Earth. This post will zoom in on how to [...]
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2:53
谷歌分析现在提供网站管理员工具搜索查询数据
» Google 黑板报 -- Google 中国的博客网志发表者：Christina Chen，产品经理
原文：Webmaster Tools Search Queries data is now available in Google Analytics
转载自：谷歌中文网站管理员博客
发布时间：2011年12月16日 上午 10:51:00
今年年初，我们宣布以来自网站管理员工具的搜索查询数据为基础，对Google Analytics中的搜索引擎优化报告进行有限试点。通过从我们的试点用户那里获得的宝贵反馈信息，我们做出了几项改进，并高兴地宣布，谷歌分析的流量来源板块现在公开提供下列报告：
查询：每天排名前1,000个查询的展示次数、点击次数、位置、和点击率信息
登陆页面：每天排名前1,000个登陆页面的展示次数、点击次数、位置、和点击率信息
地理信息摘要：按照国家划分的展示次数、点击次数、和点击率信息
所有的这些搜索引擎优化报告都可以为谷歌分析进行更深层次的数据分析提供先进的过滤和可视化功能。利用二级维度，您可以采用网站管理员工具目前无法提供的方式来查看自己网站的数据。
为使网站所有者启用这些搜索引擎优化报告，您必须是经过网站站长工具验证的网站所有者，也必须是该网页的谷歌分析管理员。一旦启用，管理员可以选择能够看到这些报告的帐户。
如果您有任何意见或建议，请登陆网站管理员帮助论坛，联系我们。 -
2:47
关于多语言内容的新标识
» Google 黑板报 -- Google 中国的博客网志发表者: Christopher Semturs，软件工程师，搜索基础结构部，Google瑞士
原文：New markup for multilingual content
转载自：谷歌中文网站管理员博客
发布时间：2011年12月16日 下午 02:20:00
许多网站都为全球用户提供服务。针对用户使用的不同语言或所处的不同地区，每个网站都有不同的方式为用户提供合适的内容。去年，为了这样的网站能够支持用不同的语言模板呈现相同的内容，我们进行了详细的分析。如今，我们将对多语言内容的支持更进一步，提高处理以下两种情形的能力：
多地区的网站使用相同的内容。如：澳大利亚、加拿大、美国的英文网页，它们仅仅在价格上有差别。
多地区的网站内容完全是翻译过来的，或者不同的语言内容针对不同的地区。如：某一产品的网页有德语、英语和法语三个版本。
明确语言及位置
我们已经加强了对rel="alternate" hreflang link元素的支持，可以处理翻译的或者用于不同地理位置的内容。“hreflang”属性能够识别任一国家的语言，或者是相同内容的不同URL。通过识别这些供选择的URL，我们的目标是能够将这些网页的信息合并起来，为用户搜索提供适当的URL。这些供选择的URL可以在同一网站，也可以在另一个域名上。
注释内容相似的网页
对于那些在多个国家展示的，却有基本相同的语言和内容的网页。您可以选择用rel="canonical" link元素来指定您首选的版本。我们会使搜索集中在这个版本，同时为用户匹配当地的URL。例如，如果您已经拥有德文版的网站，而针对德国、奥地利和瑞士等不同地区的用户，用Google搜索相同产品时您都想呈现此页面，就可以使用这个方法。
范例
具体解释如何操作，我们来看一些URL实例：
http://www.example.com/——网站首页，西班牙语
http://es-es.example.com/——供西班牙用户使用的版本，西班牙语
http://es-mx.example.com/——供墨西哥用户使用的版本，西班牙语
http://en.example.com/—— 通用英语版本
在所有这些网页中我们可以使用以下标示来制定语言和选择地区：
如果您想指定某一地区的子标签，我们会假定那是您的目标区域。
请记住所有注释网页都是以一对一的URL为基础的。请谨慎使用特定的URL，而不是首页，因为二者都可以链接到搜索内容。
更多帮助
如果您在运行多地区及多语言网站方面需要更多帮助，和往常一样，您可以浏览关于该主题的帮助中心文章并在我们的网站管理员帮助论坛上提问
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Oracle, Cisco crow new database flash dash record
» Oracle Professional
Best 2-CPU server result ever - with Violin's chips. Oracle claims a world-record TPC-C result with its database running on a Cisco server and not an Exadata system, although doesn't mention that two Violin memory flash arrays were needed.
A Cisco UCS C250 extended memory server with two six-core Xeon X5690 processors, 384GB of DRAM, and two Violin Memory flash arrays (5.3TB V-3205 and 16.3TB V-6000) ran Oracle's 11g database on Oracle Linux, and scored 1,053,100 transactions per minute (tpmC), with a cost per transaction of $0.58.
This was the third lowest cost-per-tpmC ever, only being beaten by the $0.49/tpmC and $0.51/tpmC of two four-processor HP Proliant systems running SQL Server. The $0.51/tpmC result used six Violin Memory V3200 flash arrays, each with with 2.6TB of flash.The $0.49 HP result used flash as well; HP P2000 array with 128 300GB SAS disk drives and D2700 enclosure with 256 120GB SSDs.
Oracle says its tech "delivered more performance, and cost nearly 11 per cent less per tpmC than the nearest competition on a configuration using identical Intel processors and memory capacity", referring to an HP result of 1,024,380 tpmC and $0.65/tpmC with a ProLiant DL380. This server featured 81 400GB SSDs plus 104 disk drives.
Both Cisco's and Oracle's canned quotes somehow forgot to mention the Violin arrays, which was somewhat surprising as the Violin storage represented the vast majority of the $602,316 bill for the tested configuration.
Kevin Closson, a technology director and performance architect in the Data Computing Division of EMC, tweeted about the result, saying: "Style: Get world record result and don't mention key storage technology that made it possible. See the word Violin?"
He also said that Violin doesn't mention Oracle on its benchmark result page, which is not quite true; the Violin page has a hot-link to the Cisco UCS tpmC result which does mention Oracle.
Source: Chris Mellor @ http://www.theregister.co.uk
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How to Recover Datafile Which Deleted Accidentally in Linux
» Chanel [K]今天有客户的数据库意外被删除了整个目录中的数据文件，操作系统级别的删除，然而幸运的是这个数据库没有崩溃，仍然处于open状态的时候，客户就发现了问题，求助到我们，最终完整地恢复了所有数据文件。
在Linux下大致重新演示一下恢复的过程，恢复的步骤与数据库版本没有太大关系，与操作系统的不同会有所不同。
1. 在数据库open的时候，直接删除users表空间中的数据文件。
SQL> select name from v$datafile; NAME -------------------------------------------------------------------------------- /app/oracle/oradata/ORCL/datafile/o1_mf_system_555wqbnk_.dbf /app/oracle/oradata/ORCL/datafile/o1_mf_undotbs1_555wqxgl_.dbf /app/oracle/oradata/ORCL/datafile/o1_mf_sysaux_555wr5p6_.dbf /app/oracle/oradata/ORCL/datafile/o1_mf_users_555wrj4o_.dbf SQL> host rm /app/oracle/oradata/ORCL/datafile/o1_mf_users_555wrj4o_.dbf
2. 尝试在users表空间中创建表，开始报错。
SQL> create table t tablespace users as select * from dual; create table t tablespace users as select * from dual * ERROR at line 1: ORA-01116: error in opening database file 4 ORA-01110: data file 4: '/app/oracle/oradata/ORCL/datafile/o1_mf_users_555wrj4o_.dbf' ORA-27041: unable to open file Linux Error: 2: No such file or directory Additional information: 3在告警日志中，同样也可以看到类似信息。
Mon Dec 19 21:48:17 CST 2011 Errors in file /app/oracle/admin/orcl/bdump/orcl_m000_3897.trc: ORA-01116: error in opening database file 4 ORA-01110: data file 4: '/app/oracle/oradata/ORCL/datafile/o1_mf_users_555wrj4o_.dbf' ORA-27041: unable to open file Linux Error: 2: No such file or directory Additional information: 3
3. 检查dbwr的进程PID
$ ps -ef|grep dbw0|grep -v grep oracle 2879 1 0 21:38 ? 00:00:00 ora_dbw0_orcl
4. dbwr会打开所有数据文件的句柄。在proc目录中可以查到，目录名是进程PID，fd表示文件描述符。
$ cd /proc/2879/fd $ ls -l total 0 lr-x------ 1 oracle dba 64 Dec 19 21:50 0 -> /dev/null lr-x------ 1 oracle dba 64 Dec 19 21:50 1 -> /dev/null lr-x------ 1 oracle dba 64 Dec 19 21:50 10 -> /dev/zero lr-x------ 1 oracle dba 64 Dec 19 21:50 11 -> /dev/zero lr-x------ 1 oracle dba 64 Dec 19 21:50 12 -> /app/oracle/product/10.2.0/db_1/rdbms/mesg/oraus.msb lrwx------ 1 oracle dba 64 Dec 19 21:50 13 -> /app/oracle/product/10.2.0/db_1/dbs/hc_orcl.dat lrwx------ 1 oracle dba 64 Dec 19 21:50 14 -> /app/oracle/product/10.2.0/db_1/dbs/lkORCL lrwx------ 1 oracle dba 64 Dec 19 21:50 15 -> /app/oracle/oradata/ORCL/controlfile/o1_mf_555wq3ng_.ctl lrwx------ 1 oracle dba 64 Dec 19 21:50 16 -> /app/oracle/oradata/ORCL/datafile/o1_mf_system_555wqbnk_.dbf lrwx------ 1 oracle dba 64 Dec 19 21:50 17 -> /app/oracle/oradata/ORCL/datafile/o1_mf_undotbs1_555wqxgl_.dbf lrwx------ 1 oracle dba 64 Dec 19 21:50 18 -> /app/oracle/oradata/ORCL/datafile/o1_mf_sysaux_555wr5p6_.dbf lrwx------ 1 oracle dba 64 Dec 19 21:50 19 -> /app/oracle/oradata/ORCL/datafile/o1_mf_users_555wrj4o_.dbf (deleted) lr-x------ 1 oracle dba 64 Dec 19 21:50 2 -> /dev/null lrwx------ 1 oracle dba 64 Dec 19 21:50 20 -> /app/oracle/oradata/ORCL/datafile/o1_mf_temp_555wrbnz_.tmp lr-x------ 1 oracle dba 64 Dec 19 21:50 21 -> /app/oracle/product/10.2.0/db_1/rdbms/mesg/oraus.msb lr-x------ 1 oracle dba 64 Dec 19 21:50 3 -> /dev/null lr-x------ 1 oracle dba 64 Dec 19 21:50 4 -> /dev/null l-wx------ 1 oracle dba 64 Dec 19 21:50 5 -> /app/oracle/admin/orcl/udump/orcl_ora_2871.trc l-wx------ 1 oracle dba 64 Dec 19 21:50 6 -> /app/oracle/admin/orcl/bdump/alert_orcl.log lrwx------ 1 oracle dba 64 Dec 19 21:50 7 -> /app/oracle/product/10.2.0/db_1/dbs/lkinstorcl (deleted) l-wx------ 1 oracle dba 64 Dec 19 21:50 8 -> /app/oracle/admin/orcl/bdump/alert_orcl.log lrwx------ 1 oracle dba 64 Dec 19 21:50 9 -> /app/oracle/product/10.2.0/db_1/dbs/hc_orcl.dat
注意其中“/app/oracle/oradata/ORCL/datafile/o1_mf_users_555wrj4o_.dbf (deleted)”字样，表示该文件已经被删除，如果是Solaris操作系统，ls命令不会有如此清晰的显示，为了在Solaris系统中确认哪个句柄对应哪个文件，则需要使用lsof程序。
5. 直接cp该句柄文件名回原位置。
cp 19 /app/oracle/oradata/ORCL/datafile/o1_mf_users_555wrj4o_.dbf
6. 进行数据文件recover
SQL> alter database datafile 4 offline; Database altered. SQL> recover datafile 4; Media recovery complete. SQL> alter database datafile 4 online; Database altered.
完成数据文件恢复。
恢复的原理是，在Linux操作系统中，如果文件从操作系统级别被rm掉，之前打开该文件的进程仍然持有相应的文件句柄，所指向的文件仍然可以读写，并且该文件的文件描述符可以从/proc目录中获得。但是要注意的是，此时如果关闭数据库，则此句柄会消失，那么除了扫描磁盘进行文件恢复之外就没有其它方法了，因此在数据库出现问题的时候，如果不确认情况的复杂程度，千万不要随便关闭数据库。重启数据库往往是没有意义的，甚至是致命的。
当然，客户的操作系统是Solaris，并且客户删除的文件还包括current online redo log，因此还有其它更复杂的操作，不在这里描述。
Related posts:
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SoftCon 2011 – My Presentation
» Chanel [K]今天上午为2011中国软件技术大会作的演讲，题目是《VLDB Statistics Gathering Strategy – Something You Need to Know But Maybe You Don’t》
Vldb Statistics Gathering Strategy View more presentations from kamusis内容实际上是分为两个部分：
1. 我认为理想的数据库表直方图信息收集的策略，这在我之前的文章－Oracle Histogram Investigation也有所描述。
2. 在使用granularity参数进行分区表统计信息收集的时候，有一些需要注意的问题，产生聚合统计信息是高效的方法，但是聚合统计信息在某些场景下却并不会如你所愿的生成。Related posts:
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Jive Is Flying High, But Is It Really in the Cloud?
» BusinessWeek Online -- Tech BeatBy Ari Levy
Jive Software's initial public offering this week sparked a debate over the meaning and merits of "cloud software."
As a decade-old company that got started when business software was delivered in packages, Jive didn't start selling Web-based subscriptions until 2007. About 60 percent of its business is now in the cloud. Clients use their software to collaborate with each other and customers.
The cloud model is cheaper to operate, allows for faster product updates and is better at collecting large amounts of data. Companies like Salesforce.com and SuccessFactors, which SAP agreed to acquire this month, are completely Web-based and valued more highly by the public markets on a price-to-sales basis than Oracle and Microsoft.
At the close of trading today, Jive had a stock market valuation of $859.5 million, or 12 times revenue over the past year. SAP paid 11.7 times sales for SuccessFactors, while Oracle has a ratio of 4.1 and Microsoft's is 3.
"There's just one problem with Jive trying to ride the coattails of SuccessFactors and other cloud company valuations: Jive is not cloud," says David Sacks, founder of Yammer, which also provides social-networking software to businesses.
If you believe Jive's pitch, it gets the best of both worlds. The company competes for customers that are pure cloud and comfortable having all their data hosted off-site. Yet, it can also sell to more highly-regulated companies in health care and financial services that need dedicated servers and aren't ready to make the move.
"We're not religious about it," Jive CEO Tony Zingale said in an interview yesterday, after ringing the opening bell on the Nasdaq Stock Market. "We let customers choose."
Taleo, like Yammer, prefers not to offer the choice. Its software, which competes with SuccessFactors in delivering talent management software, is for companies that are in the cloud or quickly migrating. Trying to deliver products the old way would just slow it down, says Jason Blessing, an executive vice president at Taleo.
What about security and privacy concerns? Those are overblown, he says. Taleo sells to the U.S. Department of Justice, and it doesn't get much more sensitive than that.
"Security issues have almost faded completely into oblivion," he says.
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Apple's Holiday Shutdown Puts Rush on App Developers
» BusinessWeek Online -- Tech BeatBy Adam Satariano
Apple has given developers a holiday deadline if they want the most recent versions of their games, photography, productivity or other applications available in the App Store when people start cashing in their iTunes gift cards.
According to a note Apple sent to developers last month, the company is shutting down from Dec. 22-29 for the winter holidays. That means in addition to engineers setting aside the development of future iPhones and iPads, the company's developer relations and application review teams are also heading for the eggnog. (Apple's retail operation will remain open.)
Apple approves each application that's available in its App Store. While it's Cupertino, California, headquarters are closed, no apps can be approved. Apple, which also closed the week of Thanksgiving, warned developers that any apps scheduled to go live during the company shutdown would be delayed until after employees return from the holiday reprieve.
Those not paying attention to the warning may find their apps temporarily dropped from the App Store. Apple told developers not to schedule any app pricing changes during that period because the system will be closed and the price change will cause the app to be unavailable for purchase.
After rushing to get their apps turned in, perhaps the slew of startups making the more than 500,000 applications available in the App Store will use the shutdown to take their own holiday break.
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AT&T, Other ISIS Partners Eye Mobile Payments Overseas
» BusinessWeek Online -- Tech BeatBy Olga Kharif
A joint venture of AT&T Mobility, T-Mobile USA and Verizon Wireless wants to bring its mobile-payment technology to markets outside the U.S., as companies try to grab a piece of the fast-growing digital wallet business.
The venture, ISIS, has held discussions to explore international opportunities, said Jaymee Johnson, a spokesman. He declined to name prospective partners, who could choose to use ISIS's brand or its technology.
ISIS is competing with Google Inc. and other consortiums and startups in the mobile payments arena. Their goal: To allow consumers to use their phones to make credit- or debit-card purchases in stores. The worldwide market is expected to reach $670 billion in total transactions by 2015, up from $240 billion this year, according to Juniper Research.
``The underlying equity partners in ISIS give us some degree of visibility and awareness beyond the U.S.,'' Johnson said in an interview. One of Verizon Wireless's two parent companies is Vodafone Group Plc, based in the U.K., while T-Mobile USA is owned by Germany's Deutsche Telekom AG.
ISIS is playing catch-up with Google in the U.S. The company's Google Wallet service launched in September, while ISIS's effort will start in two cities in mid-2012. Google's service has recently run into problems: Verizon Wireless blocked it from the new Galaxy Nexus smartphone, citing security concerns.
Industry support for ISIS is growing. This week, the venture announced that Gemalto NV will be one of its technology providers in the U.S. The company is the world's biggest maker of smart cards, which contain embedded memory chips used to carry out various functions such as access control and payment transactions.
ISIS has also announced agreements with payment networks including Visa Inc. and handset makers including Motorola Mobility Holdings Inc. -
Rocket Fuel Aims for 2012 IPO to Boost Online Ad Sales
» BusinessWeek Online -- Tech BeatBy Brian Womack
Rocket Fuel Inc., an online advertising company, may join what's becoming a long parade of technology companies.
If market conditions allow, Rocket Fuel is aiming for an initial public offering in 2012 as the company expands its sales, said Chief Executive Officer George John. Rocket Fuel will have more than $40 million in revenue this year, up from about $16 million in 2010, he said. That's more than Zillow Inc., the online real estate company, had before its IPO earlier this year, John said.
The company, which helps companies place ads on websites and mobile devices in real time, is benefiting from international growth and strong demand from current customers. More than 90 percent of its clients renewed spending on Rocket Fuel in the third quarter from the second quarter, he said. Those customers increased their spending by an average of 50 percent.
The company's backers include Nokia Growth Partners and Northgate Capital. Before a potential public offering, the Redwood City, California-based company plans to raise capital in the first quarter to fund growth and acquisitions, he said.
``If there's a speed limit for us, we haven't found it yet,'' John said.
Other initial public offerings this past year include Groupon Inc., the daily deals site, and LinkedIn Corp., the professional services networking service.
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8:49
Google 2011年公益捐助
» Google 黑板报 -- Google 中国的博客网志发布者： Shona Brown, Google.org高级副总裁
圣诞节即将到来了，我想这是一个很好的时机跟大家分享一下，Google今年在教育、科技及打击现代奴役等领域所提供的公益捐助。
STEM 和女童教育
作为一家以科技创新为主的公司，我们深切地体会到，坚定不移地开展科学、技术、工程和数学(STEM)领域的教育计划，可以为年轻人开辟广阔的新天地。因此，我们已经决定资助16个在STEM领域的教育计划，其中包括波士顿的公民学校(Citizen Schools)和英国的造就天才(Generating Genius)这两个组织的计划，他们可以帮助教育资源匮乏的年轻人扩大教育视野。我们的捐助总共可以让 300 多万学生提高在 STEM 领域的知识水平。
除了STEM领域，我们还支持发展中国家/地区的女童教育的计划。一个简单但却作用显著的事实是：为女童提供教育，不仅能让她们自己，更能让她们的家庭乃至社区有更大的机会获得长远的发展。例如，非洲领导力学校 (African Leadership Academy)可为非洲大陆有希望的年轻女性提供奖学金，以培养新一代的非洲领导人；以及阿富汗学习协会 (Afghan Institute of Learning)可为阿富汗乡村地区的女性提供扫盲课程。类似这样的公益组织将会使用我们的资金，为发展中国家/地区的 1 万多名女童提供教育机会。
科技就是力量
这一类别的 15个受助团体展现出的开创精神和创新思维令我惊叹不已。他们利用网络和开放源代码编程来连接社区，并拓宽人们获取信息的渠道。例如，维塔那 (Vittana)帮助放贷者向发展中国家/地区的有为学生提供贷款，其贷款还款率达到 99%，这可使受贷者的收入能力提高一倍或两倍。美国代码(Code for America)可帮助网络行业的人才将其技术运用到公共部门，开发各种项目以提高政府工作透明度，并鼓励公民广泛参与公共事务。还有，Switchboard正与非洲的移动服务提供商合作，帮助当地的医疗服务人员创建网络并提供免费的通讯服务。
打击现代奴役和贩卖人口
现代奴役是一个涉及 2700 万人和数十亿美元的罪恶行业；我们希望这一紧迫问题能够引起人们更多的关注，为打击这种犯罪行为尽我们的一己之力。为此，我们正向多个致力于解决这些问题的团体提供资助。例如，在印度， 国际正义使命团 (IJM) 与英国广播公司全球服务信托基金会 (BBC World Service Trust)以及助学行动 (Aide et Action)将组成一个新联盟，与当地政府在第一线开展合作，以杜绝劳动抵债的现象，具体措施包括曝光奴隶主、将虐待行为记录在案、解放被奴役的个人和家庭，并为他们提供康复护理和就业培训。
在美国，IJM 与致力于在美国和全世界范围内终结奴役和人口贩卖的各种倡议组织展开合作。我们的支持将帮助他们扩大各种有力工具的覆盖范围,如奴隶足迹计算器(Slavery Footprint calculator)和北极星项目(Polaris Project)的美国人口贩卖热线(National Trafficking Hotline)等。
这些活动只是我们每年慈善工作的一部分。在这一年里，Google 向全球各种公益组织和学术机构提供了超过 1.15 亿美元的资助；我们的实物支持（例如Google Grants和Google Apps for Education等向符合要求的组织提供免费产品和服务的计划）总价值超过 10 亿美元，而我们每年在公司范围内开展的GoogleServe活动以及相关计划都能发动 Google 员工进行 4 万多小时的志愿者工作。
2011 年已经接近尾声，这一年来接受捐助的团体给我的感触很多，我也期待在 2012 年看到他们改变世界的努力。
如想阅读有关Google 2011年公益捐助的全球博客，请参照这里。
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12月UCD书友会，北京、上海、南京、广州、杭州、厦门、成都、福州
» UCDChina.com各城市书友会地址：
北京，西直门附近奇遇花园，
18号（周日）、下午14:30，
联系人：Kent.Zhu 13716983554上海，长宁区江苏路369号（愚园路口）兆丰世贸大厦28楼 分众传媒 第一会议室（分众驿站旁）
主题：坎坎坷坷又一年 —— 年终大盘点
18号（周日）、下午14:30，
联系人：EOL 13661653237南京，长江后街6号6号楼3楼 途牛旅游网
18号（周日）、下午14:30，
联系人：JunChen 18602513365深圳，
本期暂停
联系人：周陟 13723766365广州，广州市天河区建中路26号315房（广州科韵路工业园管理处左侧）
17号（周六）、下午14:30，
联系人：胡晓 18666088119杭州，西湖区通普路41号 BetaCafe
主题：去你的2011. 年终盘点
18号（周日）、下午14:30，
联系人：稻草 13858008642厦门，厦门市洪莲路20号楼19号（厦门牛庄文创园·@爱特咖啡）
主题：跨平台产品设计、年终盘点
17日（周六）、下午14:30，
联系人：中华 18605926895成都，春熙路小科甲巷1号第一城B座6楼，民土咖啡馆（电话028-86730998）
18号（周日）、下午14:30，
联系人：老妖 13550272317福州，鼓楼区温泉支路58号杨振华851（网龙公司）飘渺庄 形体房
18号（周日）、下午14:30，
联系人：苏伟华 18659139527书友会详细信息：http://ucdchina.com/club/
转载请注明出自UCDChina.com，谢谢。
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Oracle CEO's beautiful Woodside farm
» Oracle ProfessionalHave a look at this interesting business news article:
Read entire article >
Oracle CEO's beautiful Woodside farm - Rediff.com Business
Passionate about buying land, Ellison, co-founder and chief executive officer of Oracle Corporation, has acquired some of most beautiful houses and land since the 1990's. | Oracle CEO's beautiful...
Cheers,
Ondrej Kubes
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Google's Home State Increases Investigations of Digital Crimes
» BusinessWeek Online -- Tech BeatBy Olga Kharif
California Attorney General Kamala Harris today unveiled a new push to fight technology crimes and identity theft in a state that's home to companies such as Google Inc., Apple Inc. and Facebook Inc.
Comprising 20 investigators and prosecutors, a high-tech unit announced today may be the largest such team in the country and will tackle crimes such as identity theft, child pornography and software piracy, as well as thefts of iPads and other devices made and imported into California, said Shum Preston, a spokesman for the California State Department of Justice. The agency's ECrime unit, formed in August, has filed 20 criminal cases to date and is investigating an additional 24, Preston said in a telephone interview.
More than 1 million Californians become victims of identity theft every year and total losses in the state exceeded $46 million in 2010, according to a department statement.
The ECrime unit will target criminals who ``increasingly use the Internet, smartphones, and other digital devices to victimize people online and offline,'' Harris said in the statement.
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Christmas-Tree Lots Push Square Past 1 Million Customer Mark
» BusinessWeek Online -- Tech BeatBy Danielle Kucera
Christmas-tree farmers like Joe and Kay Gersch helped push Square Inc. past the one-million merchant customer mark in time for the yearend holidays.
Square, the mobile-payments provider created by Twitter Inc. co-founder Jack Dorsey, reached the milestone last week.
Small businesses like Yawn Station Christmas Tree Farm , located in Independence, Louisiana, are crucial to helping Square compete in the market for mobile payments, which may exceed $170 billion by 2015, compared with an estimated $60 billion this year, according to Juniper Research. The company is vying with companies such as EBay Inc.'s PayPal, which has 103 million users and also is encouraging shoppers to use smartphones to buy through its payments network.
Square's technology lets businesses handle payments via Apple Inc.'s iPhone and iPad, as well as devices running on Google Inc.'s Android software. The card reader plugs into the headphone jack of the mobile device and lets merchants swipe customers' credit and debit cards.
The ability to take credit cards has increased sales by about 40 percent at Yawn Station Christmas Tree Farm, Joe Gersch said. ``If everyone came and paid with credit or debit it would save me money, because it would cost me less than I pay in gas to go to the bank and deliver the deposits,'' he said. ``Most of my older customers already knew I only accepted cash or check, so the people that I've already used Square with have been new.''
Square is targeting small businesses that may not be able to afford traditional machinery that handles credit cards, Chief Operating Officer Keith Rabois has said. Gersch, 65, had to buy his first smartphone to operate the card reader. He signed up for the service about three weeks ago after Square called and pitched its service, he said.
Customers who visit Yawn Station sometimes spend the whole day at the farm, picking a tree and chopping it down themselves. Before now, someone without cash would have to drive 20 miles to the nearest automated teller machine before they bought a tree or any of the add-ons the farm offers - wreaths, for instance, or a horse-drawn carriage ride, Gersch said.
The sales will help Yawn Station sell 1,000 to 1,200 trees this season at an average $55 to $60 apiece, more than the 800 it sold last year, Gersch said. ``Customers don't realize I work 365 days a year to provide that tree,'' said Gersch, whose farm has about 7,000 trees. ``We're trying to provide an entire experience when you come here.''
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5:44
Cookbook creating Business Rule Engine with a simple Decision Table in Oracle SOA Suite
» AMIS Technology blogFor educational purposes I’ve created a cookbook in powerpoint format on how to create a simple decision table in Oracle SOA Suite with a Business Rule engine. To share this I’ve uploaded it to slideshare and post it here in the Amis blog as well. Cookbook Oracle SOA Business Rules View more presentations from Emiel Paasschens. Additional remark: xml-, [...]
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Tibco CEO's Soiree Draws HP's Whitman, Valley Revelers
» BusinessWeek Online -- Tech Beat(This story was updated to include Ranadive's title in the headline).
By Aaron Ricadela
Meg Whitman, Chad Hurley, Tom Siebel and a passel of Golden State Warriors joined more than 300 other guests crammed in Tibco Software CEO Vivek Ranadive's Atherton, Calif., mansion Saturday night for the executive's annual Christmas bash. Amid the Indian buffet, sushi station and several wet bars deployed around the manse, Whitman took time out to tell me about her long-term plans at Hewlett-Packard, where she's CEO.
Whitman, who took the reins Sept. 22, says she plans to stay at HP for a while. The company needs a CEO who's going to stick around, she says, and she decided when accepting the job that she wouldn't take a future position working for her friend and political ally Mitt Romney, should he win next year's presidential election. Whitman is HP's third CEO in a year and a half; she replaced Leo Apotheker, who lasted less than 11 months after succeeding Mark Hurd."I couldn't take it and then leave," says Whitman, who attended with her husband, the neurosurgeon Griffith Harsh.
After losing last year's California gubernatorial election to Jerry Brown, Whitman -- who was CEO of EBay for 10 years until 2008 -- didn't plan on becoming a CEO again, she says. Now, she's taking a pragmatic approach to solving HP's woes, which included several quarters of disappointing sales forecasts under Apotheker and his ill-fated decision to explore a spin-out of HP's PC group.
Other guests at the swanky soiree, staffed by legions of waiters, bartenders and valets, included the Siebel Systems founder, YouTube founder Hurley, SAP Chief Technology Officer Vishal Sikka, and the academic Vivek Wadhwa. Also in attendance were players for the NBA's Golden State Warriors, which Ranadive partly owns.
Ranadive, who runs business software maker Tibco, has also been profiled by the New Yorker's Malcolm Gladwell for the way he coached his daughter's school basketball team, which ended up at the national championships. During the party, Ranadive's home basketball court, which sits below his finished basement, became a dance floor for the younger attendees.
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1:33
Factorial in Oracle SQL – using both new Recursive Subquery and classic Connect By approach
» AMIS Technology blogI regularly teach a masterclass on Oracle SQL. One of the topics I explore in depth is the use of the CONNECT BY query style to perform not just hierarchical queries but also networking or even generic recursive SQL. In Oracle Database 11g, the recursive subquery was formally introduced, the SQL Standard’s approach to this [...] -
23:47
Weird ADF 11g requirement addressed with left outer join and modern SQL join syntax
» AMIS Technology blogThe functional requirement was a little unusual. The page should either show all master-records or – depending on the value of a parameter – it should show exactly one master-record joined with exactly one detail-record. The use case was valid – that was exactly the functionality that was required. In terms of EMP and DEPT -I [...]
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Before Zynga, Pincus Thrived as Investor
» BusinessWeek Online -- Tech BeatBy Douglas MacMillan
As Mark Pincus enters the final days of Zynga's road show, he's aiming to sell investors on the prospects for the social-gaming startup, set to raise $1 billion in an initial public offering later this week.
It's a reversal of roles for Pincus, a finance whiz who once worked as an investment banking analyst and who has, over the past decade-and-a-half, amassed a portfolio of early investments in some of tech's hottest startups.
Pincus is one of the earliest and most consistent backers of social media. Through an acquaintance with Peter Thiel, Pincus got a chance in 2004 to participate in the first outside funding round of Facebook, as I wrote in a profile this week.According to Thiel, Pincus and Reid Hoffman were the only angel investors who were interested in taking a chance on the startup at the time. Pincus was also an investor in Friendster, the social media pioneer that was quickly overshadowed by MySpace and Facebook. While that bet soured as Friendster fizzled, Pincus may fare better from his stakes in three social-Web up-and-comers: Twitter, Buddy Media and LikeALittle.
A few of the bets placed by Zynga founder have already paid off. Impulse Buy Network, an e-commerce service provider, was acquired in 1999 by Inktomi for about $112 million. Spam blocker Brightmail, another Pincus investment, was bought by Symantec in 2004 for about $300 million.
Other startups he's backed include Napster, Xoom, Seesmic, Grockit, EVDB (later renamed Eventful), Technorati, Feedster, Socialtext, Nanosolar, Mahalo and 360buy.
Pincus is also an avid investor in the public markets, and has described his investing strategy on his blog. "I love investing, especially in public securities where you get an immediate score card of how you're doing," he wrote in 2005. "My reality is that I will always be a macro investor, meaning I invest in big picture themes rather than based on detailed fundamental analysis."
He got in on Google's IPO in 2004, a bet that has netted fivefold returns. In 2005, he recommended buying Amazon.com and shorting eBay, writing, "it seems clear that Amazon should one day be worth more than eBay." Six years later, Amazon's $86 billion market cap is more than double eBay's. Pincus also bragged in 2007 that he sold Yahoo when the stock was trading at $32. It's now trading at less than half that.
Pincus is not one to shy away from sharing investing insights. In late 2002, he called his friend and fellow tech entrepreneur Auren Hoffman, advising him to buy shares of Corio Inc., a little-known software outfit then trading at about 50 cents. Hoffman shrugged off the stock tip, and then watched as Corio shares rose seven-fold over the next year. It was later bought by IBM."He's incredibly perceptive financially -- much more so than any tech entrepreneur I know," says Hoffman, who now runs Web analytics firm Rapleaf. "You should always bet on Mark."
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4:18
UKOUG 2011 – Drag, Drop and other Stuff. Using your Database as a File Server
» AMIS Technology blogLast Thuesday, Mark Drake, Senior Product Manager and I, delivered a good presentation during UKOUG in Birmingham about how to use your database, via XMLDB functionality, as a file server. The presentation demonstrated as well how you could extent the “standaard” file server (aka your database) functionality with features like, WebDAV driven ACL Security and [...]
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Oracle JRockit is Free – Learn All About it with Packt's Oracle JRockit Book and eBook
» Oracle Professional
Oracle JRockit is a high performing Java Virtual Machine which, earlier this year, was made free and publicly available by Oracle Corporation. Now is the time for Java Developers to learn all about JRockit using: Oracle JRockit: The Definitive Guide – a book and eBook from Packt Publishing.
Oracle JRockit is a high performing Java Virtual Machine which, earlier this year, was made free and publicly available by Oracle Corporation.
Now is the time for Java Developers to learn all about JRockit using: Oracle JRockit: The Definitive Guide – a book and eBook from Packt Publishing.This book helps Java Developers gain in-depth knowledge of Java from the JVM’s point of view. It explains how to write code that works well with the JVM to gain performance and scalability. Starting with the inner workings of the JRockit JVM and finishing with a thorough walkthrough of the tools in the JRockit Mission Control suite, this book is for anyone who wants to know more about how the JVM executes Java applications and how to profile for better performance.
Written by two of the core team members of the JRockit team – Marcus Hirt and Marcus Lagergren – this book will be a valuable addition to the bookshelves of anyone seeking to work with a high performance JVM. The book is available in print, ebook, kindle and select library formats.
About Packt Enterprise. Packt Enterprise is one of the world’s leading publishers of Oracle Fusion Middleware information. Titles in recent years have included: Oracle ADF Enterprise Application Development—Made Simple Getting Started with Oracle BPM Suite 11gR1 – A Hands-On Tutorial Oracle Weblogic Server 11gR1 PS2: Administration Essentials Oracle SOA Suite 11g R1 Developer's GuideAnd many more.
Packt is committed to serving the informational needs of all Oracle professionals and has launched its own in-house library platform: PacktLib.The Oracle collection on PacktLib allows web access to all Packt’s Oracle titles, and users are free to print, copy, and paste. The library costs $120 per year, and contains more than sixty titles. Source: http://www.prweb.com
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1:52
纪念集成电路之父、英特尔创始人罗伯特·诺伊斯84周年诞辰
» Google 黑板报 -- Google 中国的博客网志罗伯特·诺伊斯（Robert Norton Noyce, 1927年12月12日－1990年6月3日），是电子器件集成电路的发明者之一，他的发明对个人电脑的普及起到关键性的作用。同时，诺伊斯也是仙童半导体公司和英特尔公司的共同创始人之一，被视为“硅谷市长”或“硅谷之父”。Google今天发布Doodle，以纪念这位集成电路之父、英特尔创始人84周年诞辰。
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23:35
Absolutely Typical – The whole story on Types and how they power PL/SQL Interoperability (UKOUG, 2011)
» AMIS Technology blogThis presentation will hopefully convince database developers that types in the Oracle Database are worth their salt – and more. With the recent improvements in 11gR2, the pieces are available to complete the puzzle of structured and modern programming with a touch of OO and more importantly to create a decoupled, reusable API that exposes [...] -
8:10
WebLogic 12c questions and answers
» AMIS Technology blogI collected some Q&A for you during the WebLogic 12c launch so here they are -
3:52
Looking back at UKOUG 2011
» AMIS Technology blogNow that the UKOUG annual conference in Birmingham is over, it’s time to write my thoughts down. As this was the second time that I attended the UKOUG conference, I already knew that it is a big conference. Lots of great speakers and a very good agenda. On the agenda were very interesting session, sometimes [...] -
23:28
The Future of Forms is ….. Forms (and some friends) (UKOUG, 2011 – with Grant Ronald)
» AMIS Technology blogSlides for the presentation I did with Grant Ronald during UKOUG 2011, last week in Birmingham. The abstract for this presentation: “Many organizations run enterprise Oracle Forms applications created in the 90s. They now wonder about the future of their application.This session tells how modernization of the application landscape could take place, [...]
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Board Turnover Falls Again at Tech Firms, Survey Says
» BusinessWeek Online -- Tech BeatBy Peter Burrows
After Sarbanes-Oxley became the law of the land in 2002, there was hand-wringing over whether public companies would be able to keep great directors on their boards. In the tech industry, at least, the more pressing issue seems to be getting them to leave.
According to a survey in late November by recruiting firm Spencer Stuart, board turnover at tech firms fell for the third year in a row this year. Only 29 percent of Silicon Valley firms added a new director in 2011, compared to 50 percent in 2008.
That's not necessarily a bad thing. During turbulent economic times, it's best to stick with proven quantities rather than introduce even more change, says study co-author Jonathan Visbal. "Boards have been battening down the hatches to ensure consistency," he says.
Another reason to stick with known quantities is the increasing difficulty in finding the people most CEOs would most like to have on their boards: other CEOs. In recent years, many boards have added by-laws that restrict their CEO from sitting on more than one or two outside boards. In particularly short supply: CEOs who have expertise in digital media, to help companies acclimate to the post-Facebook world.
"Often companies go with younger candidates who may not have much experience, but that's the trade-off they need to make," says Visbal.
As for the directors themselves, it seems the trade-offs are getting easier. For the year, the average number of board meetings fell to 8, from 9.7 two years ago. Yet director pay increased 14 percent, to an average of $251,630. And the pay is far more reliable, since more of it is paid in cold hard cash. The number of companies that gave stock options to directors fell to 60 percent, from 72 percent in 2010. Restricted stock awards were also down, to 58 percent from 65 percent in 2010. While cash retainers fell slightly as well for the year, they're up 78 percent since 2003, says study co-author Nyla Rizk.
The data comes in a year that has had more than its share of corporate governance fiascos. Yahoo fired Carol Bartz without having a successor in place. HP pushed out Leo Apotheker after less than a year on the job, and replaced him with director Meg Whitman. Still, the co-authors say the data does not suggest a decline in the quality of governance in tech.
"Governance has gotten better," says Rizk, who notes that the number of boards that separate the chairman and CEO duties has risen from 45 percent in 2003 to 73 percent.
Since one wouldn't expect a recruiter to bash his potential clients, I asked Paul Hodgson, a researcher with the Corporate Library, a corporate governance advisory firm, if he agreed that the fall in turnover was no cause for concern. He did.
"It's a smart thing to do to stick with people who know the business well -- unless, of course, you have a lousy board," he says.
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11:55
FreeBSD 9.0-RC3 Available
» FreeBSD Project NewsFreeBSD 9.0-RC3 Available
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6:09
GET，POST以及安全获取更多网络信息
» Google 黑板报 -- Google 中国的博客网志发表者：Pawel Aleksander Fedorynski 索引团队软件工程师；Maile Ohye 开发人员项目技术指导
原文：GET POST and safely surfacing more of the web
转载自：谷歌中文网站管理员博客
发布时间：2011年12月9日 上午 11:14:00
随着网络的发展，谷歌的抓取和索引能力也需要与时俱进。我们改善了flash索引，建立了一个更加强大的Caffeine系统， 我们甚至绘制了抓取表单。现在，特别当JavaScript和AJAX日渐普及后，我们发现越来越多的网页需要POST请求——因为网页的全部内容或因为有些网页信息缺失以及/或者POST无法返回资源而使网页无法显示。对于谷歌搜索来说，出现这一现象并不理想，因为如果我们没有正确地搜寻和索引内容，便无法呈现最全面、准确的结果。
通常情况下，我们建议使用GET来抓取网页所需资源，这是至今为止我们找到的最好的抓取方法。我们做过一些实验，将POST请求重新写入GET，在某些情形下，这是一种有效策略。一般说来，网络服务器从GET和POST返回的结果是完全不同的。另外，使用POST还有一些合理的原因（比如使用过程中，比起GET，在POST请求中可以附加的数据更多）。因此，虽然GET请求仍然更普遍，但为了从网页上获取更多内容，Googlebot会执行POST请求，因为我们认为它既安全又合适。
为了避免在网站上执行任务而导致用户任何意想不到的操作，我们采取了一定的措施。POST主要是用来抓取与网页自动请求相关的资源，模仿一个普通用户在浏览器中打开网址所看到的内容。随着时间推移，我们会逐步发现更好的模式，但目前我们还是用这一方法。
下面我们来看一些POST请求脚本，来说明我们如何随着网络的发展而改进信息抓取和索引功能的。
Googlebot的POST请求范例
通过POST重新定位抓取一个网页信息
通过POST XMLHttp请求抓取一条资源
在这个逐步进行的例子中，我们按照page renders产生的自动XMLHttp请求，既改善了页面索引又改善了其即时预览效果。
1. 谷歌抓取到网址,yummy-sundae.html.
2. 谷歌开始索引yummy-sundae.html，在此过程中，尝试渲染页面以便更好地理解内容以及/或者产生即时预览。
3. 在渲染过程中，yummy-sundae.html使用POST方法，自动发送一条XMLHttp请求资源，hot-fudge-info.html.
4. 通过POST请求得到的网址 hot-fudge-info.html，和其数据负载一起添加到Googlebot的抓取队列里。
5. Googlebot执行一个POST请求抓取hot-fudge-info.html网页信息。
6. 现在谷歌准确地呈现出一个可供即时预览的yummy-sundae.html网址。在某些情形下，我们还可以将 hot-fudge-info.htm网址内容合并在 yummy-sundae.html网址中。
7. 谷歌完成yummy-sundae.html网址的索引。
8. 用户搜索 [hot fudge sundae]。
9. 现在谷歌算法能够更好地确定yummy-sundae.html与此请求的相关度，我们能够恰当地呈现网页快照来提供即时预览。
提高您网站的抓取和索引能力
在我们的网站站长工具帮助可以找到建立可抓取网页的常规建议。对于那些想帮助谷歌抓取和索引他们的网站内容以及/或者产生即时预览的网络管理员，以下建议可供参考：
要获取资源，首选GET，除非有特殊原因需要使用POST。
确保我们可以抓取所需资源来渲染你的页面。在上面的例子中，如果hot-fudge-info.html无法获得robots.txt的允许，Googlebot便不能获取资源。更微妙的是，如果发出XMLHttp请求的JavaScript代码位于外部.js文件，无法获得robots.txt的允许，我们便不能看到 yummy-sundae.html 和hot-fudge-info.html两个网址的关联，所以即使hot-fudge-info.html网址本身不能获得允许，对我们也没有多大帮助。我们在纷繁的网络中甚至见到过更加复杂的相关性链接，允许Googlebot收集所有需要的信息有助于谷歌更好地理解您的网站。
您可以通过网站管理员工具“实验室 -> 即时预览.”来检测资源是否被锁定。
确保返回给Googlebot的内容和返回到用户浏览器的内容相同。隐藏真实内容（发给Googlebot的内容与发给用户的不同）违反了网站站长指南，因为，这会使我们向搜索者提供一个无关结果——用户在浏览器中看到的内容很可能与我们抓取和索引的内容完全不符。我们看到过许多POST请求的案例，网站管理员并无恶意的隐藏真实内容（这仍然是违反条例的），哪怕是最微小的改变，都会引起JavaScript错误，阻碍精确索引，且完全违背了最初隐藏真实内容的初衷。总的来说，如果你想让你的网站能够顺利索引，最好避免这种会引起麻烦的隐藏行为。
为了核实你没有不经意地隐藏真实内容，你可以使用网站管理员工具中的即时预览，或者在浏览器中将你的用户-代理字符串设置成如下：
Mozilla/5.0 (compatible; Googlebot/2.1;
+http://www.google.com/bot.html)
如此改动后，网页应该没有任何变化。如果你看到一个空白页，JavaScript错误，或者如果页面有一部分消失或者出现变化，就存在问题了。
切记将重要内容（比如你要索引的内容）记录在文本中，在页面上能一眼看到，不需要用户操作就能显示。大部分搜索引擎都是基于文本的，这样与基于文本的页面内容配合都能起到最好的效果。虽然我们一直在改进对各种格式的内容进行抓取和索引的能力，但是对于重要的信息来说，最好还是使用文本格式。
控制你的内容
如果你想要阻止网页内容被谷歌网络搜索抓取或索引到，最好的办法是用传统的robots.txt 文件指令。
未来趋势
我们将继续努力，使我们的检索更加全面，以便搜索者能查到更多相关信息。我们希望我们的收集和检索能力随着时间逐步提高，如同网络本身在不断提高一样。如有疑问或问题，请与我们联系。
