From: | Shridhar Daithankar <shridhar_daithankar(at)persistent(dot)co(dot)in> |
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To: | pgsql-performance(at)postgresql(dot)org |
Subject: | Re: postgres on a beowulf? (AMD)opteron? |
Date: | 2003-05-20 06:44:03 |
Message-ID: | 200305201214.03432.shridhar_daithankar@nospam.persistent.co.in |
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Lists: | pgsql-performance |
On Monday 19 May 2003 22:58, george young wrote:
> Has anyone run postgres on a beowulf system?
>
> I'm shopping for a new server. One candidate would be a
> quad opteron (64-bit AMD "hammer") machine. Another approach might
> be a beowulf of single or dual opterons. I imagine the beowulf
> would be a bit cheaper, and much more expandable, but what about
> the shared memory used by the postgres backends? I gather that
> postgres uses shared memory to coordinate (locks?) between backends?
Postgresql will not run on beowulf at all since it is an MPI system and
postgresql can no span a single database across machines (yet). Further it
won't even run on mosix because mosix does not support shared memory across
machines.
>
> I have a smallish DB (pgdump|bzip2 -> 10MB), with ~45 users logged in
> using local X(python/gtk) postgres client apps.
Well, you haven't put how many transactions you do, but in general for that
sort of DB, a P-IV/512MB RAM and SCSI disk would be more than enough unless
you are doing really exotic things with data..
> [Next question is: has anyone used postgres on an opteron at all??]
Well, if it runs linux as good as anything else, postgresql will run as good
as anything else..:-)
HTH
Shridhar
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