Software and Technologies Used

　　1.Stack Overflow uses a WISC stack via BizSpark

　　2.Windows Server 2008 R2 x64: Operating System

　　3.SQL Server 2008 R2 running Microsoft Windows Server 2008 Enterprise Edition x64: Database

　　4.Ubuntu Server

　　5.CentOS

　　6.IIS 7.0: Web Server

　　7.HAProxy: for load balancing(高性能的负载TCP/HTTP均衡器)

　　8.Redis: used as the distributed caching layer.(作为分布式缓存层的NoSQL数据库)

　　9.CruiseControl.NET: for builds and automated deployment(.NET平台的持续集成工具)

　　10.Lucene.NET: for search

　　11.Bacula: for backups(开源的数据备份系统)

　　12.Nagios: (with n2rrd and drraw plugins) for monitoring(监视系统运行状态和网络信息的远程监控软件)

　　13.Splunk: for logs(日志分析工具)

　　14.SQL Monitor: from Red Gate - for SQL Server monitoring

　　15.Bind: for DNS

　　16.Rovio: a little robot (a real robot) allowing remote developers to visit the office “virtually.”

　　17.Pingdom: an external monitor and alert service.(网站监控服务及网站速度测试工具)

　　External Bits

　　Code that is not included as part of the development tools:

　　1.reCAPTCHA(用于验证码验证，已被Google收购)

　　2.DotNetOpenId(.NET 平台上的 OpenID 实现方案)

　　3.WMD - Now developed as open source. See github network graph (轻量级所见即所得编辑器)

　　4.Prettify(代码高亮显示)

　　5.Google Analytics

　　6.Cruise Control .NET

　　7.HAProxy(负载均衡)

　　8.Cacti(网络流量监测图形分析工具)

　　9.MarkdownSharp(Markdown文本处理器的C#实现)

　　10.Flot(基于JQuery的纯JavaScript实现的绘图库)

　　11.Nginx(反向代理服务器)

　　12.Kiln(分布式版本控制系统)

　　13.CDN: none, all static content is served off the sstatic.net, which is a fast, cookieless domain intended for static content delivered to the Stack Exchange family of websites.

　　(没有使用CDN，用一个专门的域名sstatic.net传递所有的静态内容)

　　Developers and System Administrators

　　14 Developers

　　2 System Administrators