Stack Exchang网站架构

由Kyle Brandt发布在http://blog.serverfault.com/2011/02/11/stack-exchanges-architecture-in-bullet-points/

I thought as a break form the normal prose some of our readers might enjoy a short overview of the Stack Exchange Network (including Stack Overflow, Server Fault, and Super User) from a technical view:

Traffic:

• 95 Million Page Views a Month
• 800 HTTP requests a second
• 180 DNS requests a second
• 55 Megabits per second

Data Centers:

• 1 Rack with Peak Internet in OR (Hosts our chat and Data Explorer)
• 2 Racks with Peer 1 in NY (Hosts the rest of the Stack Exchange Network)

Production Servers*:

• 12 Web Servers (Windows Server 2008 R2)
• 2 Database Servers (Windows Server 2008 R2 and SQL Server 2008 R2)
• 2 Load Balancers (Ubuntu Server and HAProxy)
• 2 Caching Servers (Redis on CentOS)
• 1 Router / Firewall (Ubuntu Server)
• 3 DNS Servers (Bind on CentOS)

Software and Technologies Used:

• C# / .NET
• Windows Server 2008 R2
• SQL Server 2008 R2
• Ubuntu Server
• CentOS
• HAProxy for load balancing
• Redis for caching
• CruiseControl.NET for builds
• Lucene.NET for search
• Bacula for backups
• Nagios (with n2rrd and drraw plugins) for monitoring
• Splunk for logs
• SQL Monitor from Red Gate for SQL Server monitoring
• Mercurial / Kiln for source control
• Bind for DNS

Developers and System Administrators:

• 14 Developers
• 2 System Administrators

*(excludes fail over and management servers)

Posted by Kyle Brandt (@kylembrandt) on February 11th, 2011

Filed under Hardware, Software