From: | "Merlin Moncure" <mmoncure(at)gmail(dot)com> |
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To: | "Arjen van der Meijden" <acmmailing(at)tweakers(dot)net> |
Cc: | "Joe Uhl" <joeuhl(at)gmail(dot)com>, pgsql-performance(at)postgresql(dot)org |
Subject: | Re: Dell Hardware Recommendations |
Date: | 2007-08-10 10:35:51 |
Message-ID: | b42b73150708100335x765469bdmc9c7135a2df0d81a@mail.gmail.com |
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Lists: | pgsql-general pgsql-performance |
On 8/10/07, Arjen van der Meijden <acmmailing(at)tweakers(dot)net> wrote:
> On 9-8-2007 23:50 Merlin Moncure wrote:
> > Where the extra controller especially pays off is if you have to
> > expand to a second tray. It's easy to add trays but installing
> > controllers on a production server is scary.
>
> For connectivity-sake that's not a necessity. You can either connect
> (two?) extra MD1000's to your first MD1000 or you can use the second
> external SAS-port on your controller. Obviously it depends on the
> controller whether its good enough to just add the disks to it, rather
> than adding another controller for the second tray. Whether the perc5/e
> is good enough for that, I don't know, we've only equipped ours with a
> single MD1000 holding 15x 15k rpm drives, but in our benchmarks it
> scaled pretty well going from a few to all 14 disks (+1 hotspare).
completely correct....I was suggesting this on performance
terms...I've never done it with the Perc/5, but have done it with some
active/active SANs and it works really well.
merlin
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