On 10/ 7/10 02:43 AM, chris wrote:
I have been testing nexenta against opensolaris 2009.06 as an iscsi target /
storage repository for Xenserver 5.6 using the same hardware and vm
configuration. The target has two xeon quad-core cpus, 4gb ram and 4 seagate
drives with opensolaris on the first and a 1tb volume on other three.
Opensolaris seems to perform very badly compared to nexenta when performing
sqlio tests on a Windows 2008 Server R2 virtual machine. The IOs/s and MB/s
from opensolaris are apporximately 10% (300 and 20) of the results from nexenta.
Are there tweaks to opensolaris that will increase the iscsi performance and
explain the difference in performance?
Thanks,
Chris
sqlio tests I was running
sqlio -kW -t2 -s120 -dM -o1 -frandom -b64 -BH -LS testfile.dat>>
sqlioResults-opensolaris
sqlio -kW -t4 -s120 -dM -o1 -frandom -b64 -BH -LS testfile.dat>>
sqlioResults-opensolaris
sqlio -kW -t8 -s120 -dM -o1 -frandom -b64 -BH -LS testfile.dat>>
sqlioResults-opensolaris
sqlio -kW -t16 -s120 -dM -o1 -frandom -b64 -BH -LS testfile.dat>>
sqlioResults-opensolaris
sqlio -kR -t2 -s120 -dM -o1 -frandom -b64 -BH -LS testfile.dat>>
sqlioResults-opensolaris
sqlio -kR -t4 -s120 -dM -o1 -frandom -b64 -BH -LS testfile.dat>>
sqlioResults-opensolaris
I'd strongly suggest trying the 134a 'development' build for
OpenSolaris. You can download an ISO image [1] or a USB image suitable
for use with the 'usbcopy' utility [2].
Nexenta is likely based on a much newer build than OpenSolaris 2009.06
which could explain the performance difference.
-Shawn
[1] http://genunix.org/dist/indiana/osol-dev-134-x86.iso
[2] http://genunix.org/dist/indiana/osol-dev-134-x86.usb
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