Re: Restore postgres to specific time

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: "Kevin Grittner" <kgrittn(at)mail(dot)com>
Cc: "wd" <wd(at)wdicc(dot)com>, "Jeff Janes" <jeff(dot)janes(at)gmail(dot)com>, pgsql-general(at)postgresql(dot)org
Subject: Re: Restore postgres to specific time
Date: 2012-11-27 15:06:14
Message-ID: 8575.1354028774@sss.pgh.pa.us
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"Kevin Grittner" <kgrittn(at)mail(dot)com> writes:
> That is the problem -- until the point where pg_stop_backup() was
> run PostgreSQL can't be sure of having a consistent database. It is
> waiting from enough WAL to get it there. My practice is always to
> keep the last two base backups and all WAL from the start of the
> earlier one to current. If I want to recover to a point in time
> which was during a backup, I use the previous base backup, which is
> complete and usable.

> It does seem that there is an opportunity here to make it more
> clear what is happening.

Seems like we could throw an error if the requested stop time is earlier
than the pg_stop_backup time. (That should then allow some code
simplification --- I imagine currently we're doing a max() calculation
somewhere ...)

regards, tom lane

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