Re: Seeking datacenter PITR backup suggestions - Mailing list pgsql-general

From Decibel!
Subject Re: Seeking datacenter PITR backup suggestions
Date
Msg-id 20070829000529.GO1386@nasby.net
Whole thread Raw
In response to Re: Seeking datacenter PITR backup suggestions  (Gregory Stark <stark@enterprisedb.com>)
Responses Re: Seeking datacenter PITR backup suggestions  (Tom Lane <tgl@sss.pgh.pa.us>)
List pgsql-general
On Tue, Aug 28, 2007 at 08:31:10PM +0100, Gregory Stark wrote:
> "Steve Crawford" <scrawford@pinpointresearch.com> writes:
>
> > 4. Much more up-to-the-minute recovery data.
> >
> > In your scenario, what about using "cp -l" (or "ln") instead? Since the
> > hard-link it is only creating a new pointer, it will be very fast and
> > save a bunch of disk IO on your server and it doesn't appear that the
> > tempdir is for much other than organizing purposes anyway.
>
> Postgres tries to reuse WAL files. Once the archive_command completes it
> believes it is safe to reuse the old file without deleting it. That will do
> nasty things if you've used ln as your archive command.

I thought that was specifically disabled when PITR was enabled? Or do we
just do a rename rather than an unlink ond creating a new file?
--
Decibel!, aka Jim Nasby                        decibel@decibel.org
EnterpriseDB      http://enterprisedb.com      512.569.9461 (cell)

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