From: Bruce Momjian <pgman@candle.pha.pa.us>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Simon Riggs <simon@2ndquadrant.com>
Cc: pgsql-hackers@postgresql.org
Subject: Re: Point in Time Recovery
Date: Tue, 13 Jul 2004 19:01:41 -0400 (EDT)
Message-ID: <200407132301.i6DN1fb16205@candle.pha.pa.us> (raw)
In-Reply-To: <19894.1089759391@sss.pgh.pa.us>
Tom Lane wrote:
> Simon Riggs <simon@2ndquadrant.com> writes:
> > So the situation is:
> > - You must only stop recovery at a point in time (in the logs) after the
> > backup had completed.
>
> Right.
>
> > No way to enforce that currently, apart from procedurally. Not exactly
> > frequent, so I think I just document that and move on, eh?
>
> The procedure that generates a backup has got to be responsible for
> recording both the start and stop times. If it does not do so then
> it's fatally flawed. (Note also that you had better be careful to get
> the time as seen on the server machine's clock ... this could be a nasty
> gotcha if the backup is run on a different machine, such as an NFS
> server.)
OK, but procedurally, how do you correlate the start/stop time of the
tar backup with the WAL numeric file names?
--
Bruce Momjian | http://candle.pha.pa.us
pgman@candle.pha.pa.us | (610) 359-1001
+ If your life is a hard drive, | 13 Roberts Road
+ Christ can be your backup. | Newtown Square, Pennsylvania 19073
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To: pgsql-admin@postgresql.org
Cc: pgman@candle.pha.pa.us, tgl@sss.pgh.pa.us, simon@2ndquadrant.com, pgsql-hackers@postgresql.org
Subject: Re: Point in Time Recovery
In-Reply-To: <200407132301.i6DN1fb16205@candle.pha.pa.us>
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