Re: RAID0 and pg_xlog

On Fri, Sep 09, 2005 at 06:20:21PM -0500, Scott Marlowe wrote:
> > pgpool is a connection pool; it has (almost) nothing to do with
> > replication. It certainly doesn't work to provide any kind of data
> > security on a RAID0 setup.
> >
> > I'm not arguing against anything people have suggested, only pointing
> > out that if you're using RAID0 your data is not safe against a drive
> > failure, except possible using pgcluster (some would argue that
> > statement-based replication isn't as reliable as log-based).
>
> Um. No. It has a synchronous replication mode, which I've used, and it
> works quite well.
>
> Look it up, it's pretty cool. Writes to both pg machines synchronously,
> reads from them load balanced. Of course, there are some limits imposed
> by this methodology, re: things like random() and such.
>
> Now, if you're arguing against statement based replication, that I can
> understand. but pgpool can definitely do two box sync replication.

Oh, I didn't realize that. Though I have to wonder why they duplicated
what pgcluster provides...
--
Jim C. Nasby, Sr. Engineering Consultant jnasby(at)pervasive(dot)com
Pervasive Software http://pervasive.com work: 512-231-6117
vcard: http://jim.nasby.net/pervasive.vcf cell: 512-569-9461