[tjpd]

After a very cursory look, isn't the answer to download and use one of Citus' free, open source extensions to the free, open source postgres? (Depending on your use-case either pg-shard or cstore-fdw)

http://citusdata.com/citus-products/pg-shard http://citusdata.com/citus-products/cstore-fdw

[ddorian43]

They require the paid version to do distributed joins.