Re: PostgreSQL and Windows 2003 DFS Replication

Csaba Nagy wrote:
>> for a cold/warm standby postgresql backup, I'd suggest using pitr.
>
> I found that PITR using WAL shipping is not protecting against all
> failure scenarios... it sure will help if the primary machine's hardware
> fails, but in one case it was useless for us: the primary had a linux
> kernel with buggy XFS code (that's what I think it was, cause we never
> found out for sure) and we did use XFS for the data partition, and at
> one point it started to get corruptions at the data page level. The
> corruption was promptly transferred to the standby, and therefore it was
> also unusable... we had to recover from a backup, with the related
> downtime. Not good for business...
>
>> It's easy to set up and administer. for hot read only backup, bite the
>> bullet and use slony.
>
> I think slony would have helped us recovering from the above mentioned
> situation earlier and easier, as it transfers logical data and not pages
> directly. It has though a bigger overhead than WAL shipping in terms of
> administration and performance penalty.

OK, but corruption at the data page level is a very unlikely
event, isn't it ?

Regards
--
Arnaud