Nov 13 2010
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Why does Quora use MySQL as the data store rather than NoSQLs such as Cassandra, MongoDB, CouchDB, etc? - Quora
Just came across this old question, where Adam D’Angelo (Quora founder, ex-CTO of Facebook) argues for MySQL. He goes on to ask about MongoDB at Foursquare, which was ironically answered 5 months later in a post-mortem by the MongoDB creator on the now infamous Foursquare crash.