Re: Backup strategy using 'wal_keep_segments'

Thanks very much for your reply Michael.

I note that it looks like pgbarman employs pg_receivexlog; I will check it out.

Regards,

Ruan

________________________________
From: Michael Paquier <michael(dot)paquier(at)gmail(dot)com>
Sent: 22 October 2017 22:17:01
To: Rhhh Lin
Cc: pgsql-general(at)postgresql(dot)org
Subject: Re: [GENERAL] Backup strategy using 'wal_keep_segments'

On Mon, Oct 23, 2017 at 5:57 AM, Rhhh Lin <ruanlinehan(at)hotmail(dot)com> wrote:
> Is this approach feasible? Assuming obviously, we have sufficient disk space
> to facilitate 1000 WAL files etc.

You expose yourself to race conditions with such methods if a
checkpoint has the bad idea to recycle past segments that your logic
is copying. So I would advise to not do that. Instead of using the
archive command, you should also consider using pg_receivexlog
combined with a replication slot. This brings way more control with
the error handling.
--
Michael