Store and serve massive amounts of time series data without losing granularity.
2016-10-08 - OpenTSDB 2.2.1 has been released with bug fixes. Please download it from GitHub
2015-11-10 - Thanks to the folks at Pythian and Google OpenTSDB can now use the original Bigtable as a backend. And for folks who have been asking, you can now choose Cassandra for storage instead of HBase. Both engines are in beta. See the Documentation for details and Github for the code.