Cassandra Usurping MySQL on Twitter - DZone PerformanceOne source had confirmed that Twitter was working with the NoSQL data store, Cassandra, late last year. Some more details have finally surfaced about this quiet transition from a MySQL + Memcached system to Cassandra. The MyNoSQL blog recently interviewed Ryan King, who is leading the Cassandra conversion efforts at Twitter. King says that Twitter needs a system that can scale as quickly as the
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