On Tue, Jul 22, 2008 at 02:42:28PM -0700, Sumit Gupta wrote: > Hi Bob > > For a storage subsystem 'COMSTAR in itself' is only a component. Other > components are HBA, PCI, CPU, backend storage etc. Each one of those > influence the performance. But so far here is what we have found. Our > reference platform is x4500 (Thumper) and we use zfs raidz zvols as our > backend. Also the protocol for these tests is FC using Qlogic 4G HBAs. > I have to also note here that most of this is done as a part of our > performance regression testing, the purpose of which is to make sure > that any bugfixes we make don't regress the performance. There is no > formal performance data yet.
I'd be interested in any recommendations you might have on raidz
configurations in the x4500. I'm looking at deploying COMSTAR+ZFS from
x4500s via our current SAN infrastructure in the very near future
(currently trialling with a pair acquired on TryNBuy). Currently I'm
using SXCE b91 and this RAID setup (note that our boot disks are on c6
because we installed from a USB DVD drive):
for i in 1 2 3 5 6 7; do zpool create poolt$i raidz c0t${i}d0 c1t${i}d0
c5t${i}d0 c6t${i}d0 c7t${i}d0 c8t${i}d0; done
for i in 1 2 3 5 6 7; do zpool add poolt${i} spare c7t0d0 c8t0d0 c7t4d0 c8t4d0;
done
zpool create pool_r10 mirror c0t0d0 c1t0d0 mirror c0t4d0 c5t4d0 mirror c1t4d0
c5t0d0
Performance on the raidz sets looks to be within about 9% of our EMC
storage for most workloads, and I'd love to close that gap a little
if possible.
Ceri
--
That must be wonderful! I don't understand it at all.
-- Moliere
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