Re: is sync rep stalled?

On Tue, Oct 5, 2010 at 2:06 AM, Aidan Van Dyk <aidan@highrise.ca> wrote:
> On Mon, Oct 4, 2010 at 10:22 AM, Fujii Masao <masao.fujii@gmail.com> wrote:
>
>> I have one question for clarity:
>>
>> If we make all the transactions wait until specified standbys have
>> connected to the master, how do we take a base backup from the
>> master for those standbys? We seem to be unable to do that because
>> pg_start_backup also waits forever. Is this right?
>
> Well, in my *opinion*, if you've told the master to not "commit to"
> *anything* unless it's synchronously replicated, you should already
> have a synchronously replicating slave up and running.
>
> I'm happy with the docs saying (maybe some what more politely):
>  Before configuring your master to be completly,
> wait-fully-synchronous, make sure you have a slave capable of being
> synchronous ready.  Because if you've told it to never be
> un-synchronous, it won't be.

How can we take a base backup for that synchronous standby? You mean
that we should disable the wait-forever option, start the master, take
a base backup, shut down the master, enable the wait-forever option,
start the master, and start the standby from that base backup?

Regards,

--
Fujii Masao
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
NTT Open Source Software Center