From: | "Scott Whitney" <swhitney(at)journyx(dot)com> |
---|---|
To: | "'Bruce Momjian'" <bruce(at)momjian(dot)us> |
Cc: | <pgsql-admin(at)postgresql(dot)org> |
Subject: | Re: Using rsync for base backups for PITR |
Date: | 2007-10-10 16:46:02 |
Message-ID: | 20071010164227.7D89F3F2710@mail.int.journyx.com |
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Thread: | |
Lists: | pgsql-admin |
In the same way that you don't have a valid archive while the tar is
running, no? In either case, I have to archive the WAL segments used during
the file system backup, right?
Is rsync a supported method for a warm standby server? Specifically, I'm
thinking about:
http://www.taygeta.com/ha-postgresql.html
-----Original Message-----
From: Bruce Momjian [mailto:bruce(at)momjian(dot)us]
Sent: Oct 10, 2007 11:39 AM
To: Scott Whitney
Cc: pgsql-admin(at)postgresql(dot)org
Subject: Re: [ADMIN] Using rsync for base backups for PITR
Scott Whitney wrote:
> I'm reading conflicting information on this. Is this a supported
technique?
>
> start_backup
> rsync the initial base backup
> stop_backup
>
> Then, periodically,
> start_backup
> rsync again
> stop_backup
>
> It's my opinion that this wouuld significantly cut down the 30GB base
backup
> I'll need to take for each PITR.
Uh, well, yes, that will work, but you don't have a valid archive
_while_ the rsync is happening. I think that would be a problem if
there was a failure during the rsync update.
--
Bruce Momjian <bruce(at)momjian(dot)us> http://momjian.us
EnterpriseDB http://postgres.enterprisedb.com
+ If your life is a hard drive, Christ can be your backup. +
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