On 03/18/2011 05:27 PM, Kevin Grittner wrote:
> Basically, what Heikki addresses. It has to be committed after
> crash and recovery, and deal with replicas which may or may not have
> been notified and may or may not have applied the transaction.
Huh? I'm not quite following here. Committing additional transactions
isn't a problem, reverting committed transactions is.
And yes, given that we only wait for ACK from a single standby, you'd
have to failover to exactly *that* standby to guarantee consistency.
> In fact, on further reflection, allowing other transactions to see
> work before the committing transaction returns could lead to broken
> behavior if that viewing transaction took some action based on the
> that, the master crashed, recovery was done using a standby, and
> that standby hadn't persisted the transaction. So this behavior is
> necessary for good behavior.
I fully agree to that.
Regards
Markus
