Druid 0.9.2-rc3 available

We’re happy to announce our next release candidate, Druid 0.9.2-rc3!

Druid 0.9.2 will contain hundreds of performance improvements, stability improvements, and bug fixes from over 30 contributors. Major new features include ability to disable rollup at ingestion time, a new groupBy engine, ability to filter on longs, new encoding options for long-typed columns, a query cache implementation based on Caffeine, a new lookup extension exposing fine grained caching strategies, support for reading ORC files, and new aggregators for variance and standard deviation.

We recommend that everyone using earlier 0.9.2 RCs upgrade to 0.9.2-rc3. I think we’re getting close to a final release; this RC adds only two relatively minor bug fixes:

Draft release notes are at:


Documentation for this release candidate is at:


You can download the release candidate here:


Please file GitHub issues if you find any problems:


Thanks everyone who contributed issues, docs, and code!