Zfs Gods,
I have been approved to buy 2 x F20 PCIe cards for my x4540 to increase our
IOPs and I was wondering what would be the most benefit to gain extra IOPs
(both reading and writing) on my zpool.
Currently I have to following storage zpool, called cesspool:
pool: cesspool
state: ONLINE
scrub: scrub completed after 14h0m with 0 errors on Sat Nov 13 18:11:29
2010
config:
NAME STATE READ WRITE CKSUM
cesspool ONLINE 0 0 0
raidz2-0 ONLINE 0 0 0
c10t0d0p0 ONLINE 0 0 0
c11t0d0p0 ONLINE 0 0 0
c12t0d0p0 ONLINE 0 0 0
c13t0d0p0 ONLINE 0 0 0
c8t1d0p0 ONLINE 0 0 0
c9t1d0p0 ONLINE 0 0 0
c10t1d0p0 ONLINE 0 0 0
c11t1d0p0 ONLINE 0 0 0
c12t1d0p0 ONLINE 0 0 0
c13t1d0p0 ONLINE 0 0 0
c8t2d0p0 ONLINE 0 0 0
raidz2-1 ONLINE 0 0 0
c9t2d0p0 ONLINE 0 0 0
c10t2d0p0 ONLINE 0 0 0
c11t2d0p0 ONLINE 0 0 0
c12t2d0p0 ONLINE 0 0 0
c13t2d0p0 ONLINE 0 0 0
c8t3d0p0 ONLINE 0 0 0
c9t3d0p0 ONLINE 0 0 0
c10t3d0p0 ONLINE 0 0 0
c11t3d0p0 ONLINE 0 0 0
c12t3d0p0 ONLINE 0 0 0
c13t3d0p0 ONLINE 0 0 0
raidz2-2 ONLINE 0 0 0
c8t4d0p0 ONLINE 0 0 0
c9t4d0p0 ONLINE 0 0 0
c10t4d0p0 ONLINE 0 0 0
c11t4d0p0 ONLINE 0 0 0
c12t4d0p0 ONLINE 0 0 0
c13t4d0p0 ONLINE 0 0 0
c8t5d0p0 ONLINE 0 0 0
c9t5d0p0 ONLINE 0 0 0
c10t5d0p0 ONLINE 0 0 0
c11t5d0p0 ONLINE 0 0 0
c12t5d0p0 ONLINE 0 0 0
raidz2-3 ONLINE 0 0 0
c13t5d0p0 ONLINE 0 0 0
c8t6d0p0 ONLINE 0 0 0
c9t6d0p0 ONLINE 0 0 0
c10t6d0p0 ONLINE 0 0 0
c11t6d0p0 ONLINE 0 0 0
c12t7d0p0 ONLINE 0 0 0
c13t6d0p0 ONLINE 0 0 0
c8t7d0p0 ONLINE 0 0 0
c9t7d0p0 ONLINE 0 0 0
c10t7d0p0 ONLINE 0 0 0
c11t7d0p0 ONLINE 0 0 0
spares
c12t6d0p0 AVAIL
c13t7d0p0 AVAIL
As you would imagine with that setup, it¹s IOPs are nothing to write home
about. No slogging or cache devices. If I get 2 x F20 PCIe cards, how would
you recommend I use them for most benefit? I was thinking paritioning the
two drives that show up form the F20, have a mirrored slogging zpool (named
slogger) and use the other two vdevs to go into cesspool as cache devices.
Or am I better to use 1 device soley for slogging and one for a cache devce
in my pool (cesspool) ... Cause if I loose the cache device the pool still
operates but slows back down? (Am I correct there?)
I am getting an outage on the prod system in December, but I will test them
in my backup x4500 (if I can) before the cut over on the prod system. I will
also be looking to go to the latest firmware and possibly (depending on
costs awaiting quote from our Sun/Oracle supplier) Solaris 11 Express ...
Thanks, will appreciate any thoughts.
--
Cooper Ry Lees
HPC / UNIX Systems Administrator - Information Management Services (IMS)
Australian Nuclear Science and Technology Organisation
T +61 2 9717 3853
F +61 2 9717 9273
M +61 403 739 446
E cooper.l...@ansto.gov.au
www.ansto.gov.au <http://www.ansto.gov.au>
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