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I am looking for open-source alternatives to SQL Server Enterprise Edition for a mostly-read analytics workload. The main key features that I'm looking for are

  • Column-oriented storage
  • Parallel query execution - in particular, sorts/group by etc. should use multiple cores, like SQL Server does.
  • Clustering / horizontal scaling options. I am not interested in sharding or shared-nothing as much as I am in being able to add additional CPUs to a single (logical) DB instance.

I looked at PostgreSQL with cstore_fdw, which gets a column-store but individual queries are still single-threaded.

What else should I be looking at?

  • Take a look at MonetDB or Vector (Actian) – marcin_koss Apr 1 '16 at 14:15
  • Consider Postgres-XL as well. Needs more machines (in a cluster) to make use of it though. – ypercubeᵀᴹ Apr 6 '16 at 11:17
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Depending on your queries, postgresql + citus + cstore_fdw may solve your problems. Citus (with sharding) can parallelize your queries, and cstore_fdw provides columnar storage.

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