Wikipedia runs on dedicated clusters of Linux servers in Florida and in four other locations. Wikipedia employed a single server until 2004, when the server setup was expanded into a distributed multitier architecture. In Jenụwarị 2005, the project ran on 39 dedicated servers located in Florida. This configuration included a single master database server running MySQL, multiple slave database servers, 21 web servers running the Apache HTTP Server, and seven Squid cache servers. By Septemba 2005, its server cluster had grown to around 100 servers in four locations around the world.