Re: Synchronous Standalone Master Redoux

On Fri, Jul 13, 2012 at 09:12:56AM +0200, Hampus Wessman wrote:
> How you decide what to do with the servers on failures isn't that
> important here, really. You can probably run e.g. Pacemaker on 3+
> machines and have it check for quorums to accomplish this. That's a
> good approach at least. You can still have only 2 database servers
> (for cost reasons), if you want. PostgreSQL could have all this
> built-in, but I don't think it sounds overly useful to only be able
> to disable synchronous replication on the primary after a timeout.
> Then you can never safely do a failover to the secondary, because
> you can't be sure synchronous replication was active on the failed
> primary...

So how about this for a Postgres TODO:

Add configuration variable to allow Postgres to disable synchronous
replication after a specified timeout, and add variable to alert
administrators of the change.

--
Bruce Momjian <bruce(at)momjian(dot)us> http://momjian.us
EnterpriseDB http://enterprisedb.com

+ It's impossible for everything to be true. +