On Mon, Jan 27, 2014 at 11:24 AM, Michael Paquier <michael.paquier@xxxxxxxxx> wrote:
PostgreSQL supports synchronous multi-master, MongoDB supports write concern, but this causes a performance penalty).Anyways I doubt that "PostgreSQL supports synchronous multi-master"Postgres core taken as such does not support multi-master. The fork of PostgreSQL called Postgres-XC somewhat does, for OLTP applications.
I know about PostgresXC, but I thought it is distributed database (similar to shards of mongoDB). [Though if I am correct there could be tables which are shared across different nodes, but that is not the best way of utilizing features of PostgresXC] I think it is not apt to call it "synchronous" (since there is no replication happening).
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Sameer Kumar | Database Consultant
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