Re: Fully-automatic streaming replication failover when master dies?

On Mon, Jan 27, 2014 at 11:24 AM, Michael Paquier <michael.paquier@gmail.com> 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).