Facebook | Engineering @ Facebook's NotesFirst Faved : Aug 21 2008 by derekFaved : 1 time with noteViewed : 25 timesFave It!
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Interesting writeup of hacking MySQL to dirty memcached entries after replication sync.
Quoted: REPLACE INTO profile (`first_name`) VALUES ('Monkey') WHERE `user_id`='jsobel' MEMCACHE_DIRTY 'jsobel:first_name'
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i also found it interesting that all their write operations happen in one location. adding this constraint does make it easier to build out a distributed data center so long as you are disciplined about minimizing writes in 'normal' conditions.
Yeah -- well, database writes anyways ... I'm sure many gigabytes of log files are generated in the replicated environment with all sorts of interesting information.