Java
Ebay[1] Starts in 1995, initial name AuctionWeb (V1) : - very simple architecture - based on perl - no database, for data persistence they used plain files Because of rapid growth they needed to improve their architecture and so V2 (clever name) was born: - replaced perl with C/C+
ibm
Searching around the HS website I noticed that there are no articles regarding db2, which has an express edition, free of charge and from what I know there aren't any restrictions. Being a powerful database system I thought it could make be an alternative to MySQL, PostgreSQL databases.
MySQL
Website stats: Webserver: Apache 2.2 Database: MySQL 5.0 APC cache for php CMS: Drupal 6.2 (bleeding-edge version)* *Aggressive caching is ON, Page Compression ON, Block Cache ON (can't use CCS),Optimize CSS/JS ON. 2 Servers: Apache/Mysql (low-tech servers - Celeron processors, 512 MB