| From: | Jim Nasby <decibel(at)decibel(dot)org> |
|---|---|
| To: | Jeff Davis <pgsql(at)j-davis(dot)com> |
| Cc: | pgsql-general(at)postgresql(dot)org |
| Subject: | Re: PITR and tar |
| Date: | 2007-05-08 15:25:58 |
| Message-ID: | 8C4728BC-E2DE-4E99-813A-3A15C3F97A80@decibel.org |
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| Thread: | |
| Lists: | pgsql-docs pgsql-general |
On May 7, 2007, at 1:58 PM, Jeff Davis wrote:
> Second, it seems that it can cause a bad backup to occur if you
> pass the
> "z" option to tar. Instead, piping the output of tar through the
> compression program seems to avoid that problem (i.e. "tar cf - ... |
> gzip > ..."). I am using FreeBSD's tar, other implementations may be
> different.
What *exactly* are you seeing there? If anything -z should be safer
than piping through gzip, since you could easily accidentally pipe
stderr through gzip as well, which *would* corrupt the backup.
> Are my observations correct, and if so, should they be documented as a
> potential "gotcha" when making base backups?
I believe the bit about tar complaining about changed files is
already in there, no?
--
Jim Nasby jim(at)nasby(dot)net
EnterpriseDB http://enterprisedb.com 512.569.9461 (cell)
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