正则表达式：在计算机科学中，是指一个用来描述或者匹配一系列符合某个句法规则的字符串的单个字符串。在很多文本编辑器或其他工具里，正则表达式通常被用来检索和/或替换那些符合某个模式的文本内容。许多程序设计语言都支持利用正则表达式进行字符串操作。例如，在Perl中就内建了一个功能强大的正则表达式引擎。正则表达式这个概念最初是由Unix中的工具软件（例如sed和grep）普及开的。正则表达式通常缩写成“regex”，单数有regexp、regex，复数有regexps、regexes、regexen。这些是正则表达式的定义。 由于起源于unix系统，因此很多语法规则一样的。但是随着逐渐发展，后来扩展出以下几个类型。了解这些对于学习正则表达式。
环境配置及症状：
AS4U8+IDS9.21.UC2
$ONCONFIG
ALARMPROGRAM /home/informix/etc/log_full.sh # Alarm program path
bar_act.log
2011-10-14 13:48:40 8063 8061 /home/informix/bin/onbar_d -b -l
2011-10-14 13:48:40 8063 8061 Begin backup logical log 311991.
2011-10-14 13:48:40 8063 8061 Successfully connected to Storage Manager.
2011-10-14 13:48:40 8063 8061 ASSERT: file bar_xbsa.ecbarSendData() line 1331 - contact product support
2011-10-14 13:48:40 8063 8061 See also: /home/informix/tmp/core
online.log
13:48:39 Logical Log 311993 Complete.
13:48:40 Logical Log 311991 - Backup Started
13:48:40 Logical Log 311991 - Backup Aborted
Aborted by client.
13:48:40 Process exited with return code 139: /bin/sh /bin/sh -c /home/informix/etc/log_full.sh 2 23 "Logical Log 311993 Complete." "Logical Log 311993 Complete."
系统逻辑日志满时，自动触发/home/informix/etc/log_full.sh 进行逻辑日志备份，bar_act.log及online.log日志信息如上（手工进行逻辑日志备份正常）
本日志由 flyinweb 于 2011-10-14 14:11:17 发表到 数据库技术 中，目前已经被浏览 374 次，评论 0 次；
作者添加了以下标签： Process exited with return code 139；
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Microsoft Windows Hyper-V Server 2008 R2 is a free version much like Windows Server 2008 R2 Core, except it comes with the Hyper-V role preconfigured.
The only thing you will have to take in consideration before installing such a server is that Hyper-V Server 2008 R2 only comes with a PowerShell/CMD-prompt. So to configure such a server you should learn some Windows commands and PowerShell cmdlets.
本日志由 flyinweb 于 2011-10-13 10:34:35 发表到 云计算与虚拟化 中，目前已经被浏览 451 次，评论 0 次；
作者添加了以下标签： Failover Cluster；
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Hyper-V虚拟机给我们带来了诸多便利，比如应用程序整合、节能、节约成本、提高资源利用率等等。随着Hyper-V虚拟机的推广，用户的使用越来越普及。很多用户在Hyper-V虚拟机中用到了MS SQL Server。但是单独（standalone）的SQL Server 不能提供高可用性和灾难恢复的功能。在对可用性有较高要求的Hyper-V用户面前，故障转移群集（Failover cluster）是必然用到的功能。当虚拟的生产服务器宕机时，热备份中的虚拟的服务器可以很快投入工作中。 然而在虚拟机上搭建故障转移群集比在物理机上搭会有更多种组合。
本日志由 flyinweb 于 2011-10-13 09:58:23 发表到 云计算与虚拟化 中，目前已经被浏览 332 次，评论 0 次；
作者添加了以下标签： Microsoft SQL Server 2008故障转移群集，Hyper-V，Failover Cluster；
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本日志由 flyinweb 于 2011-10-09 22:48:00 发表到 数据库技术 中，目前已经被浏览 236 次，评论 0 次；
作者添加了以下标签： Oracle Database List of Books，Oracle；
- 序言
懒，是一个优点，有些时候还是要学一学才能会了的。
—— 柴锋（1979- ）
我的这些文字是从这几年来的 PuTTY 使用经验中慢慢得来的，也不仅仅是介绍 PuTTY，还包括了一些相关的软件，比如：优秀的 FTP 工具 FileZilla、功能强大的 SFTP 客户端 WinSCP。
杂七杂八的乱说了一些，这里把大致内容罗列如下：
- 最简单的使用，登录 SSH 主机
- 中文乱码的处理
- PuTTY 常用配置的说明
- 复制、粘贴
- 保存会话
- 注销
- 自动登录用户名
- 自动设置环境变量
- 设置代理服务器
- 自动执行命令
- 备份、删除 PuTTY 的设置
- PuTTY 的 X11 转发
- 如何用 PuTTY 建立 SSH 隧道
- 如何用 PuTTY 建立反向的 SSH 隧道，像个特洛伊木马一样突破防火墙
- 把 PuTTY 作为一个安全的代理服务器
- 安全的上网不被嗅探
- 避免 MSN 等聊天工具被监听
- 安全的上网不被嗅探
- 怎样用 PSCP、PSFTP 安全的传输文件
- 功能强大的 SFTP 客户端 WinSCP
- 功能强大的 SFTP 客户端 WinSCP
- 用 PuTTYgen 生成密钥，登录 SSH 主机不再需要口令
- Pagent 代理密钥，每次开机只需要输入一次密钥口令
- Plink 简单而又迅速的执行 SSH 主机上的程序
- 常见问题
本日志由 flyinweb 于 2011-09-29 10:11:40 发表到 技术文摘 中，目前已经被浏览 264 次，评论 0 次；
作者添加了以下标签： PuTTY tutorial，PuTTY；
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本文的受众
如果你遇到了以下问题，那么你应该阅读这篇文章
- 我听说过这种技术，我对它很感兴趣
- 我想在家里访问我在公司的机器（写程序，查数据，下电影）。
- 公司为了防止我们用XX软件封锁了它的端口或者服务器地址。
- 公司不让我们上XX网站，限制了网址甚至IP。
- 公司不让我们看关于XX的信息，甚至花血本买了XX设备，能够对内容进行过滤。一看XX内容，链接就中断了。
- 我爸是搞电脑的，他在家里的路由器上动了手脚，我不能看XXX了。
带着这些问题，我们先从什么是ssh隧道开始。
本日志由 flyinweb 于 2011-09-29 09:30:54 发表到 技术文摘 中，目前已经被浏览 373 次，评论 0 次；
作者添加了以下标签： SSH tunnel；
首页只显示了部分日志内容，要查看日志的全部内容请阅读全文；
SQLite Optimization FAQ
Jim Lyon (jplyon@attglobal.net)10-Sep-2003
Compiled from sqlite docs, source, and yahoo postings
This document is current for SQLite 2.8.6
1. Introduction
1.1. About this FAQ
This FAQ is an incomplete summary of my experiences with speed-optimizing an application that uses the SQLite library. It will be of most use to people who are already familiar with using SQLite. Feel free to send any questions and comments.
It is released under the terms of the SQLite license :)
** The author disclaims copyright to this material. ** In place of a legal notice, here is a blessing: ** ** May you do good and not evil. ** May you find forgiveness for yourself and forgive others. ** May you share freely, never taking more than you give.
1.2. Table of Contents
- Introduction
- PRAGMA settings
- Transactions
- Indexes
- Optimizing queries
- Moving code into SQL
- User functions
- Callback functions
- Reducing database file size
- Reducing database load time
- Reducing SQL query parse time
- Hacking the source
- Using the btree interface
- Multiple threads
- Operating system issues
本日志由 flyinweb 于 2011-09-28 11:07:11 发表到 数据库技术 中，目前已经被浏览 325 次，评论 0 次；
作者添加了以下标签： SQLite Optimization，SQLite，SQLite tuning；
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最新评论
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2012-01-23 12:43:15 by john.hein7It is quite useful and interesting too.
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2011-11-03 18:24:08 by dave
VIRT 的上限是64G,也就是36位, cat /proc/cpuinfo的结果是:addre
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2011-11-03 18:20:48 by dave
昨天要准备用线程重写webbench,试验了下Fedora Linux 2.6.35.14
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2011-07-17 11:53:47 by flyinweb
不明白您的具体的意思是什么？
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2011-07-17 11:52:40 by flyinweb
已经发送到你QQ邮箱
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2011-07-16 00:16:38 by 蜡笔小清
http://www.2mysite.net/scriptencoder/screnc.asp 站长你好，看
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2011-06-30 23:35:12 by jans1086
你好，我发现一个问题，就是从mysqld2同步过来的数据，在mysqld1的
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2010-12-02 03:54:04 by ZRYK
晕，我说是怎么回事情，原来我和你一样，忘记设置了活动分区
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