Re: streaming replication breaks horribly if master crashes

Fujii Masao <masao.fujii@gmail.com> writes:
> On Thu, Jun 17, 2010 at 5:26 AM, Robert Haas <robertmhaas@gmail.com> wrote:
>> The real problem here is that we're sending records to the slave which
>> might cease to exist on the master if it unexpectedly reboots. I
>> believe that what we need to do is make sure that the master only
>> sends WAL it has already fsync'd (Tom suggested on another thread that
>> this might be necessary, and I think it's now clear that it is 100%
>> necessary).

> The attached patch changes walsender so that it always sends WAL up to
> LogwrtResult.Flush instead of LogwrtResult.Write.

Applied, along with some minor comment improvements of my own.

			regards, tom lane