| From: | "Joshua D(dot) Drake" <jd(at)commandprompt(dot)com> |
|---|---|
| To: | Jeff Frost <jeff(at)frostconsultingllc(dot)com> |
| Cc: | Bucky Jordan <bjordan(at)lumeta(dot)com>, Luke Lonergan <llonergan(at)greenplum(dot)com>, pgsql-performance(at)postgresql(dot)org |
| Subject: | Re: availability of SATA vendors |
| Date: | 2006-11-22 17:00:16 |
| Message-ID: | 1164214816.2868.18.camel@localhost.localdomain |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-performance |
On Wed, 2006-11-22 at 08:36 -0800, Jeff Frost wrote:
> On Wed, 22 Nov 2006, Bucky Jordan wrote:
>
> > Dells (at least the 1950 and 2950) come with the Perc5, which is
> > basically just the LSI MegaRAID. The units I have come with a 256MB BBU,
> > I'm not sure if it's upgradeable, but it looks like a standard DIMM in
> > there...
> >
> > I posted some dd and bonnie++ benchmarks of a 6-disk setup a while back
> > on a 2950, so you might search the archive for those numbers if you're
> > interested- you should be able to get the same or better from a
> > similarly equipped LSI setup. I don't recall if I posted pgbench
> > numbers, but I can if that's of interest.
>
> I could only find the 6 disk RAID5 numbers in the archives that were run with
> bonnie++1.03. Have you run the RAID10 tests since? Did you settle on 6 disk
> RAID5 or 2xRAID1 + 4XRAID10?
Why not 6 drive raid 10? IIRC you need 4 to start RAID 10 but only pairs
after that.
Joshua D. Drake
>
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