InfluxDB – Open-source distributed time-series, events, and metrics database
I was actually looking at a bunch of open source time series databases and settled on kairosdb but this looks pretty nice.<p>I think there is a hackernews rule someplace that a more interesting tech alternative shows up right when you decided to go with something else.<p>For reference here is the list I created when researching these:<p><a href="http://opentsdb.net/overview.html" rel="nofollow">http://opentsdb.net/overview.html</a> 
Built on HBASE<p><a href="http://www.gocircuit.org/vena.html" rel="nofollow">http://www.gocircuit.org/vena.html</a>
Built on go + go'circult uses google's leveldb<p><a href="https://code.google.com/p/kairosdb/" rel="nofollow">https://code.google.com/p/kairosdb/</a>
A rewrite of opentsdb which can use Cassandra<p><a href="http://blueflood.io/" rel="nofollow">http://blueflood.io/</a>
Built by Rackspace, decent but still seems a bit immature<p><a href="http://graphite.wikidot.com/" rel="nofollow">http://graphite.wikidot.com/</a>
Obligatory Graphite reference
(uses whisper, new backend called 'ceres' is being developed)<p><a href="https://github.com/agoragames/kairos" rel="nofollow">https://github.com/agoragames/kairos</a> (yet another 'kairos', alternative backends for graphite - SQL, redis, or mongo)<p>Riak seems to be popular with SASS metric providers (hosted graphite, boundary).  There isn’t any code but there are a couple of talks that explain how and why they went with Riak:<p><a href="http://basho.com/hosted-graphite-uses-riak-to-store-all-customer-metrics/" rel="nofollow">http://basho.com/hosted-graphite-uses-riak-to-store-all-cust...</a>
<a href="http://boundary.com/blog/tag/tech-talks/" rel="nofollow">http://boundary.com/blog/tag/tech-talks/</a><p><a href="http://vimeo.com/42902962" rel="nofollow">http://vimeo.com/42902962</a>