| From: | "Luke Lonergan" <LLonergan(at)greenplum(dot)com> |
|---|---|
| To: | "Merlin Moncure" <mmoncure(at)gmail(dot)com>, "Alex Turner" <armtuk(at)gmail(dot)com> |
| Cc: | "Ron Peacetree" <rjpeace(at)earthlink(dot)net>, "Mikael Carneholm" <Mikael(dot)Carneholm(at)wirelesscar(dot)com>, pgsql-performance(at)postgresql(dot)org |
| Subject: | Re: RAID stripe size question |
| Date: | 2006-08-03 04:51:06 |
| Message-ID: | 3E37B936B592014B978C4415F90D662D03F0D7F6@MI8NYCMAIL06.Mi8.com |
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| Thread: | |
| Lists: | pgsql-performance |
Merlin,
> moving a gigabyte around/sec on the server, attached or no,
> is pretty heavy lifting on x86 hardware.
Maybe so, but we're doing 2GB/s plus on Sun/Thumper with software RAID
and 36 disks and 1GB/s on a HW RAID with 16 disks, all SATA.
WRT seek performance, we're doing 2500 seeks per second on the
Sun/Thumper on 36 disks. You might do better with 15K RPM disks and
great controllers, but I haven't seen it reported yet.
BTW - I'm curious about the HP P600 SAS host based RAID controller - it
has very good specs, but is the Linux driver solid?
- Luke
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