Hmm, open source, persistent key-value store, just released by Facebook. 1 billion key/value pairs inserted in 103 minutes, 126K ops/sec reading http://rocksdb.org/ https://github.com/facebook/rocksdb/wiki/Performance-Benchmarks For comparison, zookeeper is doing 7 inserts/sec on lsst-dbdev6, that is about 4 1/2 years to insert 1B records... Jacek ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the QSERV-L list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=QSERV-L&A=1