I have used http://influxdb.com/ http://influxdb.com/, I have used it with a few million records. Getting the data out is a bit slow because it goes over HTTP.

I have used http://influxdb.com/ http://influxdb.com/, I have used it with a few million records. Getting the data out is a bit slow because it goes over HTTP. Also make your InfluxDB library of choice can deal with HTTP chunking. I found that if you request a lot of data from InfluxDB and the system does not have enough memory, the process will silently die. If you have mega huge data http://opentsdb.net/ http://opentsdb.net/ seems pretty decent, however I have not tried it out.