I'm doing backup on a second, spare server, by backing up WAL files. I'm
using that server for analysis queries and reporting. Every 15 minutes I
need to shut down that server, place in new WAL files, and restart
server. That is ok, except that I need to backup whole database cluster.
That wasnt't a problem before, but recently another database is in the
cluster, and it's also backed up, although I dont' need it there.

Is there a way (even if it means a hard way?) to somehow extract DML
(except SELECTs, of course, but those aren't ih the log files, right?)
from the WALs, so I can 'replay' it where ever I find it useful?

Mike


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TIP 6: explain analyze is your friend

On Tue, May 23, 2006 at 05:47:31PM +0200, Mario Splivalo wrote:
> I'm doing backup on a second, spare server, by backing up WAL files. I'm
> using that server for analysis queries and reporting. Every 15 minutes I
> need to shut down that server, place in new WAL files, and restart
> server. That is ok, except that I need to backup whole database cluster.
> That wasnt't a problem before, but recently another database is in the
> cluster, and it's also backed up, although I dont' need it there.
>
> Is there a way (even if it means a hard way?) to somehow extract DML
> (except SELECTs, of course, but those aren't ih the log files, right?)
> from the WALs, so I can 'replay' it where ever I find it useful?

No, because the WAL files don't actually contain any of that
information. They only record changes at a page/block level, and care
not what commands actually made the changes.

Slony might do what you're looking for...
--
Jim C. Nasby, Sr. Engineering Consultant jnasby@pervasive.com
Pervasive Software http://pervasive.com work: 512-231-6117
vcard: http://jim.nasby.net/pervasive.vcf cell: 512-569-9461

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