mysql 在国外facebook,flickr等公司内的使用情况

mysql conference现场提问的一个资料，网上见过很多版本了，这个表格版本看起来最直观

Â	How many servers	Number of DBAs	How many web servers	Number of caching servers	Version of MySQL	Language, platform	Operating System
MySQL	1 M, 3 S	1/10	2	2	5.1.23	Perl,php and bash	Linux fedora
Sun	2 clustered, 2 individual	1.5	160+	8	5.0.21	Lots of stuff (java mostly)	Open Solaris
Flickr	166	At present 0	244	14	5.0.51	Php and some Java	Linux
Fotolog	140 databases on 37 instances	10 instances a DBA	70	40 ( 2 on each, 80 total)	4.11 and 4.4	Php, 90% Java	Solaris 10
Wikipedia	20	None, but everybody is kind of a DBA	70+200	40 ( 2 on each, 80 total)	Â	Php, c++, python	Fedora / Ubuntu
Facebook	30000 databases, 1800 db servers	2	1200	805	5.0.44 with relay log corruption patch	Php, python, c++ and erlang	Fedora / RHEL
Youtube	I can not say	3	I can not say say	I can not say	5.0.24	Python	SuSE 9

基本上用MySQL 5.0, 操作系统则是Linux的天下，开发语言用php,python,java,c++,另外facebook还用erlang的
MySQL对DBA的需求较小，程序员就是dba
facebook平均每个db server有20个数据库
前2个公司没多少参考价值(传统行业)，youtube 啥也不愿意说, I can not say...