What is Memcached?

Memcached is a generic purpose distributed high performance memory object caching system to use in speeding up dynamic database driven websites by caching data and objects in memory to reduce the amount the database needs to be read.

Memcached was originally developed by Danga Interactive for LiveJournal but is now used by many popular and large community driven websites like Slashdot, Wikipedia, SourceForge, GameFAQs, Facebook, Digg, Fotolog, Kayak and like. It is being distributed under a permissive free software licence. Know more about who all are using memcached

By default, memcached uses the port 11211. Among other technologies, it uses libevent. Memcached’s APIs provide a giant hash table distributed across multiple machines. When the table is full, subsequent inserts cause older data to be purged in least recently used (LRU) order. Applications using memcached typically layer memcached requests and additions into code before falling back on a slower backing store, such as a database.

Memcached Resources :
http://www.danga.com/memcached/
http://www.search-this.com/2007/07/24/an-introduction-to-memcached/
http://en.wikipedia.org/wiki/Memcached
http://www.socialtext.net/memcached/
http://meta.wikimedia.org/wiki/Memcached
http://www.linuxjournal.com/article/7451
http://jehiah.com/projects/memcached-win32
http://php.net/memcache
http://jehiah.com/projects/j-memcached
http://www.deveiate.org/projects/RMemCache/
http://cheeseshop.python.org/pypi/memcached/1.31
http://search.cpan.org/dist/Cache-Memcached/
http://tangent.org/index.pl?node_id=506
http://people.freebsd.org/~seanc/pgmemcache/
http://www.livenation.com/opensource