other alternatives:<p>now:<p>* Pivotal Greenplum Database - is now Open Source : <a href="https:&#x2F;&#x2F;github.com&#x2F;greenplum-db&#x2F;gpdb" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;greenplum-db&#x2F;gpdb</a><p>later:<p>* CitusDB 5.0 will be open source (2016Q1-Q2) :<p>( &quot;An extension of PostgreSQL to be distributed&#x2F;parallel query engine&quot;  )<p><a href="https:&#x2F;&#x2F;twitter.com&#x2F;frsyuki&#x2F;status&#x2F;667031289506062336" rel="nofollow">https:&#x2F;&#x2F;twitter.com&#x2F;frsyuki&#x2F;status&#x2F;667031289506062336</a><p><a href="http:&#x2F;&#x2F;info.citusdata.com&#x2F;CitusDB-5-Pre-Beta.html" rel="nofollow">http:&#x2F;&#x2F;info.citusdata.com&#x2F;CitusDB-5-Pre-Beta.html</a><p>* PostgreSQL 9.6 will have a &quot;Parallel Sequential
Scans&quot; :<p><a href="http:&#x2F;&#x2F;amitkapila16.blogspot.hu&#x2F;2015&#x2F;11&#x2F;parallel-sequential-scans-in-play.html" rel="nofollow">http:&#x2F;&#x2F;amitkapila16.blogspot.hu&#x2F;2015&#x2F;11&#x2F;parallel-sequential-...</a>