Re: Standalone synchronous master

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Josh Berkus <josh(at)agliodbs(dot)com>
Cc: pgsql-hackers(at)postgresql(dot)org
Subject: Re: Standalone synchronous master
Date: 2014-01-08 21:49:58
Message-ID: 17702.1389217798@sss.pgh.pa.us
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Josh Berkus <josh(at)agliodbs(dot)com> writes:
> If we really want auto-degrading sync rep, then we'd (at a minimum) need
> a way to determine *from the replica* whether or not it was in degraded
> mode when the master died. What good do messages to the master log do
> you if the master no longer exists?

How would it be possible for a replica to know whether the master had
committed more transactions while communication was lost, if the master
dies without ever restoring communication? It sounds like pie in the
sky from here ...

regards, tom lane

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