Simon Riggs <si...@2ndquadrant.com> writes:
> On Tue, 2010-09-07 at 11:17 -0400, Tom Lane wrote:
>> We can *not* allow the slave to replay WAL ahead of what is known
>> committed to disk on the master.  The only way to make that safe
>> is the compare-notes-and-ship-WAL-back approach that Robert mentioned.
>> 
>> If you feel that decoupling WAL application is absolutely essential
>> to have a credible feature, then you'd better bite the bullet and
>> start working on the ship-WAL-back code.

> Why not just failover? 

Guaranteed failover is another large piece we don't have.

                        regards, tom lane

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