[Linux-cluster] Postgresql under RHCS4
Riaan van Niekerk
riaan at obsidian.co.za
Tue Jun 13 09:44:25 UTC 2006
> >
> > You don't need a replication system there. Use an SAN :)
> >
>
> And now we have a SPOF - SAN or NAS... how to get beyond that?
>
> >
If you do not have or want a SAN, you can investigate one of the replicated file
systems or block devices. Here are some:
- Radiant Data PeerFS (we had a customer running this but had too many
problems and had to disable it.)
- NetVault Replicator (http://www.bakbone.com/products/replication/) -
looks pretty good, but havent tried it myself. They even have a whitepaper
on using Replicator with GFS on the above page.
- DRBD (Distributed Replicated Block Device) - www.drdb.org
and with commercial support at http://www.linbit.com/linhac_drbd.html?L=1
They are my preferred choice (based on a hands-off evaluation) since they are
OSS, but the documentation is not quite there yet, relative to the other
two.
If anyone has had good/bad experiences with these or any other replicated
block devices / file systems, myself (and I am sure the original author)
would like to hear them. I have a significant number of smaller customers
who want HA and RHCS, but a SAN is just not a cost-effective option in
those environments.
Riaan
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