Re: 3 disks configured RAID 0 over 10 disks configured in RAID 5 (self replicating SAN)

On Tue, Aug 27, 2013 at 7:18 PM, Rene Romero Benavides
<rene(dot)romero(dot)b(at)gmail(dot)com> wrote:
> First of all, thank you so much for your valuable time.
>
> It probably does, though we have a requirement of having available at least
> twice the expected database size, and 50% of disk space overhead sounds like
> too much for us to take in a replicated SAN environment and a PostgreSQL
> master/slave - streaming replication setup.
>
> our options regarding disks availability at the moment are:
> a 3 disks array dedicated for PostgreSQL in any RAID configuration we'd
> like
> OR
> a 10 disks array shared with 14 virtual machines running the middleware
> layer and the application infrastructure in a RAID 5 configuration
>
> again, I do really appreciate your kindly help.

Whatever you do do NOT put postgresql on a RAID-5 array if you can
help it. Can you steal a few disks for a 4 or 5 disk RAID 1E?