Hostingová architektura StackExchange – říjen 2011

Štavnaté detaily o provozování webů v síti StackExchange (StackOverflow atd) StackExchange Architecture Updates - Running Smoothly, Amazon 4x More Expensive Considered having a failover mode so that all the NY traffic could fail over to Oregon in a read-only mode. You couldn't ask new questions, but since much of the value of the site is in reading, a read-only site has value. Use a commercial Orion network monitor. Keeps all data on SQL server. Web logs are stored in SQL server too. Long term trend towards having all data in SQL Server. They create 1 table a day to store stats. Redis Servers are used as a shared state cache between the 10 servers. Requests can be load balanced across the servers. A CDN gets you 80% of the way for handling international users as opposed to running in multiple zones. Moving to Amazon is not a good idea: Can't trust Amazon with their outages. Amazon would be more than 3x more expensive. Amazon would cost $17K a month and they pay $4K a month now, after the initial hardware purchases.