Apache Derby Papers

标签: | 发表时间:2021-05-25 16:06 | 作者:
出处:http://db.apache.org

Apache Derby Papers

This  ad hoc spot in the Derby site hosts papers, and check the  Derby Wiki for more.

Derby Engine

The table below summarizes resources that describe the Derby engine.

Navigation Menu Entry Title
Javadoc Engine
Language
Tools
API
Architecture Derby Engine Architecture Overview
BTree BTree package documentation
Disk Page Format Derby On Disk Page Format
How Things Work How Things Work
Intersect & Except Intersect & Except Design
JDBC Derby JDBC Implementation Notes
Log Format Derby Write Ahead Log Format
Logging & Recovery Derby Logging and Recovery
Optimizer Derby Optimizer Design
Type System Derby Type System (Note: if your browser shows HTML source for this page instead of displaying it, save the file locally with  File -> Save Page As, then open the file you saved.)
Versioning Derby Versioning Scheme

Derby Network Client

The table below summarizes white papers that describe the Derby Network Client.

Navigation Menu Entry Title
Functional Spec Derby Network Client

Instruction

The online  Apache Derby Tutorial provides a quick hands-on overview. Pointers to even more tutorials and other instructional materials are on the  Derby Wiki.

How to Contribute Papers

If you have figured out how something works in Derby or how to do something cool and have produced a white paper you would like to contribute to the Derby web site, please  open a Jira issue with the component set to "Web Site". Upload your contribution to that issue with the "Attach file to this issue" option. It will prompt you to click on "Grant license to ASF for inclusion in ASF works", and this is the permission we need in place to host your contribution on the Derby web site.

As time permits, somebody will take the document from the Jira issue and put it on the Derby web site. You can speed the posting process up by  testing your white paper in Forrest to verify it works well before you post it.

If you want the paper integrated with the Derby web site, with the forrest-generated navigation, it is easiest to incorporate these types of files:

That much said, even though your favorite word processing program can produce an HTML file, that doesn't necessarily mean that forrest can read it and do something visually pleasing with it. If forrest can't consume your document, or you don't like what forrest did with it, or you want to provide your document in a binary format it can be included in its native format on the site -- it just won't have the forrest-generated left hand navigation and top banner. Examples are:

You can also link directly to a file in the Derby code tree; for example, to the  Building Derby file. Don't link with a viewcvs URL like the one below because it turns out to put a heavier burden on the server than is needed:

   https://svn.apache.org/viewcvs.cgi/*checkout*/db/derby/code/trunk/BUILDING.txt

ViewCVS is good for when you need to browse the history. But if all you need to do is display the file, link to it like this instead:

   http://svn.apache.org/repos/asf/db/derby/code/trunk/BUILDING.txt

Last Updated: March 30, 2005

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Apache Derby Papers

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Derby Type System (Note: if your browser shows HTML source for this page instead of displaying it, save the file locally with . It will prompt you to click on "Grant license to ASF for inclusion in ASF works", and this is the permission we need in place to host your contribution on the Derby web site..

Derby SQL 分页

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    之前在网上看到有人问 Derby SQL 分页实现的问题,网上有人给出这样的解决方案,SQL 如下:. 其实,这样的分页查询,性能不理想,我试过在 300W 数据量中采用这种分页方式,需要 20~30秒之久;其实 Derby 10.6 以上版本有更好的分页支持,直接给出 SQL 实现如下:.

Apache Shiro 介绍

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Apache防止攻击

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为了防止恶意用户对Apache进行攻击,我们需要安装mod_security这个安全模块. mod_security 1.9.x模块的下载与安装. 下载地址: http://www.modsecurity.org/download/index.html. 建议使用1.9.x,因为2.x的配置指令与1.x完全不同,解压后进入解压目录,执行:.

Apache OpenOffice 3.4发布

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Apache OpenOffice的第一个版本v3.4正式发布. 主要新特性包括:改进ODF支持,包括ODF 1.2加密选项和新电子表格功能;改进Calc组件的数据透视表(Pivot Table)支持;原生支持SVG,增强图形如线帽和剪切变形;简体和繁体中文等原生语言支持;改进性能等. 在甲骨文将OpenOffice.org捐给Apache软件基金会后,OOo的命运曾存在许多争议.

Apache PDFBox 1.8.0 发布

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Apache PDFBox 1.8.0 发布了,该版本除了修复大量 bug 之外,还包含如下新特性:. PDFBox是Java实现的PDF文档协作类库,提供PDF文档的创建、处理以及文档内容提取功能,也包含了一些命令行实用工具. PDF 文档加密与解密. 与 Lucene搜索引擎的集成. 填充PDF/XFDF表单数据.

Apache Log4j 2.0介绍

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Apache Log4j 2.0介绍. 作者:chszs,转载需注明. 作者博客主页:http://blog.csdn.net/chszs. Apache Log4j是著名的Java日志框架之一,在早些年应用最广. 但近两年来,随着SLF4J和LogBack的兴起,很多流行的开源框架在日志模块方面逐步转移到SLF4J+LogBack上,Log4j日渐衰落.

Apache 的 MaxClients 與 MaxRequestsPerChild

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對於 Apache 架設的伺服器,在遇到連線數問題上,以下參數是會考慮微調的. 不過遇到多個 VirtualHost 與連線變多時,需要適時調整. ServerLimit 與 MaxClients 是針對同時間最大連線數為多少,也等於是 Apache 程序數量,ps 一下就會有多少個 /usr/sbin/httpd 等.

apache 工作模式

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如果httpd -l列出prefork.c. 则表示是 prefork 工作方式. 这表明当前apache2的工作方式是 prefork. prefork的工作原理是,控制进程在最初建立“StartServers”个子进程后,为了满足MinSpareServers设置的需要创建一个进程,等待一秒钟,继续创建两个,再等待一秒钟,继续创建四个……如此按指数级增加创建的进程数,最多达到每秒32个,直到满足MinSpareServers设置的值为止.

Apache投票接受OpenOffice.org

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