[osol-discuss] opensolaris iscsi target gives 10% performance compared to nexenta
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 -- This message posted from opensolaris.org ___ opensolaris-discuss mailing list opensolaris-discuss@opensolaris.org
Re: [osol-discuss] opensolaris iscsi target gives 10% performance compared to nexenta
Are you using COMSTAR or the old iSCSI target on OpenSolaris? -- This message posted from opensolaris.org ___ opensolaris-discuss mailing list opensolaris-discuss@opensolaris.org
Re: [osol-discuss] opensolaris iscsi target gives 10% performance compared to nexenta
Comstar. Thanks, Chris -- This message posted from opensolaris.org ___ opensolaris-discuss mailing list opensolaris-discuss@opensolaris.org
Re: [osol-discuss] opensolaris iscsi target gives 10% performance compared to nexenta
Have you tried disabling the ZIL to see if that is your bottleneck? -- This message posted from opensolaris.org ___ opensolaris-discuss mailing list opensolaris-discuss@opensolaris.org
Re: [osol-discuss] opensolaris iscsi target gives 10% performance compared to nexenta
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 ___ opensolaris-discuss mailing list opensolaris-discuss@opensolaris.org
