会有越来越多的人使用memcached

1. 谁在使用memcahed?
David Li
Email: david.li.china@gmail.com

2. memcached
From www.danga.com
Originally used for livejournal.com
目前被许多网站广泛应用．
高性能，分布式内存缓存系统
设计目的是为了减少ＤＢ的访问．
更适合于读写ratio高的网站．
多API支持
Linux 2.6 (epoll) and FreeBSD (kqueue)

3. Livejournal.com
Perl + MySQL + memcached
数据：[2005年]
12 servers for memcached
28 instances
30GB of cached data
90-93% hit rate
20 million + page views per day

4. Digg.com
LAMP + memcached
目前digg版本是3.0
数据：[2007年4月， still growing]
More than 10 million page views per day
More than 1.2 million UV per day
100+ Linux boxes

5. Feedburner.com
Tomcat + Spring [EHCahe]+ MySQL
+ Memcached
数据：[2006年]
115Mbps带宽
270000 feeds
100 million hits per day

6. Fotolog.com
Apache + PHP + Java/Hibernate +
MySQL + Memcached
数据：[2007年]
228 million member photos
90 million page views per day
500k photos uploaded a day record

7. Wikipedia.org
LAMP + memcached
Other technical toys: squid, lucene, and
lighttpd
数据：[2007年, still growing]
3000 page views per second
More than 8000 http requests per second
More than 25000 SQL requests per second
12 db servers
20 servers in object cache role

8. mixi.jp
Linux + Apache + Perl + MySQL +
Memcached +Squid
数据：[2006年, still growing]
39 memcached machines x 2GB memory
More than 100 MySQL servers
When 10,000 users, PV/day is 600,000
[two months later after launch]

9. Other websites
Slashdot.org
Sourceforge.net
Kayak.com
Facebook.com
More to come
中国的网站