Simon Willison’s Weblog

Reddit is now running on Cassandra. Migrating their persistent cache over from memcacheDB to Cassandra took one developer just ten days.

# 13th March 2010, 12:14 am / cassandra, memcachedb, caching, reddit

Introducing Digg’s IDDB Infrastructure. IDDB is Digg’s new infrastructure component for sharding data across multiple databases, with support for both MySQL and memcachedb. “The DiggBar and URL minifying service is powered by a 16 machine IDDB cluster, which includes 8 write masters in the index and 8 MySQL storage nodes.”

# 3rd April 2009, 8:42 pm / joe-stump, databases, digg, iddb, memcachedb, mysql, scaling, sharding

MemcacheDB. A server that speaks the memcache protocol but uses Berkeley DB for reliable persistent storage. Speedy: 20,000 writes/second and 60,000+ reads/second. Includes a full replication mechanism (with custom memcache protocol commands) based on Berkeley DB’s.

# 5th January 2009, 12:37 pm / replication, memcachedb, berkeleydb, memcache, scaling, keyvaluepairs