11. Mixi (Facebook japonais) Tokyo Tyrant (client) Tokyo Cabinet (server) several server mecanism asynchronous replication multi-master, master/slave map/reduce in Lua API compatibility w Memcached in memory or disk Tokyo Tyrant
21. C++ Zvents, Baidu very similar to Hbase needs DFS (like Hadoop) HQL HyperTable
22. Java Facebook then Apache very similar to Hbase marriage of Dynamo and BigTable supercolumn, column tunable concistency decentralized fault tolerant (data center) elasticity Cassandra
26. pretty straightforward pretty close from our previous DB drivers developped in parallel several ODM in Ruby schema-less ! easy querying no fulltext search (well not really) rethinking how we store data kind of builtin denormalization Experience w Mongo http://www.rocketblogging.com