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From: Scott Whitney <scott@journyx.com>
To: Craig James <cjames@emolecules.com>
Cc: pgsql-admin@postgresql.org
Subject: Re: Cold backup with rsync -- WAL files?
Date: Fri, 6 Dec 2013 09:24:28 -0600 (CST)
Message-ID: <23125649.944094.1386343468257.JavaMail.root@mail.int.journyx.com> (raw)
In-Reply-To: <CAFwQ8rd+oDkLG4KWkux=2jwNinBnuwhY8DH3W-_58MGO1m3=Lg@mail.gmail.com>
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Why not use cascading replication for this? That's precisely what I'm doing. 

----- Original Message -----

> We need a "last chance" offsite backup of our backup server. Since
> the backup server isn't accessed by customers, we have the luxury of
> being able to shut it off briefly once per day. Call server "A" the
> backup, server "B" is offsite backup-of-backup: The procedure I'd
> like to implement is:

> server B is always "cold" (Postgres not running)
> while A is running, rsync A --> B
> stop Postgres on A
> rsync A --> B
> restart Postgres on A

> My question is: what about the WAL files? Do I need to rsync them
> from A to B too, or can/should I just clean out B's WAL directory,
> or something else?

> Thanks,
> Craig

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