Do you have NICs that support iSCSI -I guess you can use hardware offloading?
MTU size ? Lattency is usually the killer of any performance, what is your round-trip time ? Best Regards, Strahil Nikolov На 21 юли 2020 г. 2:37:10 GMT+03:00, Philip Brown <[email protected]> написа: >AAAAAH! my apologies. It seemed very odd, so I reviewed, and discovered >that I messed up my testing of direct lun. > >updated results are improved from my previous email, but not any better >than going through normal storage domain. > >18156: 61.714: IO Summary: 110396 ops, 1836.964 ops/s, (921/907 r/w), >3.6mb/s, 949us cpu/op, 27.3ms latency > >17095: 61.794: IO Summary: 123458 ops, 2052.922 ops/s, (1046/996 r/w), > 4.0mb/s, 858us cpu/op, 60.4ms latency > > > >----- Original Message ----- >From: "Philip Brown" <[email protected]> >To: "Paolo Bonzini" <[email protected]> >Cc: "Nir Soffer" <[email protected]>, "users" <[email protected]>, >"qemu-block" <[email protected]>, "Stefan Hajnoczi" ><[email protected]>, "Sergio Lopez Pascual" <[email protected]>, >"Mordechai Lehrer" <[email protected]> >Sent: Monday, July 20, 2020 4:30:32 PM >Subject: Re: [ovirt-users] very very bad iscsi performance > >FYI, I just tried it with direct lun. > >it is as bad or worse. >I dont know about that sg io vs qemu initiator, but here is the >results. > > >15223: 62.824: IO Summary: 83751 ops, 1387.166 ops/s, (699/681 r/w), >2.7mb/s, 619us cpu/op, 281.4ms latency >15761: 62.268: IO Summary: 77610 ops, 1287.908 ops/s, (649/632 r/w), >2.5mb/s, 686us cpu/op, 283.0ms latency >16397: 61.812: IO Summary: 94065 ops, 1563.781 ops/s, (806/750 r/w), >3.0mb/s, 894us cpu/op, 217.3ms latency > >_______________________________________________ >Users mailing list -- [email protected] >To unsubscribe send an email to [email protected] >Privacy Statement: https://www.ovirt.org/privacy-policy.html >oVirt Code of Conduct: >https://www.ovirt.org/community/about/community-guidelines/ >List Archives: >https://lists.ovirt.org/archives/list/[email protected]/message/MAVOLDANXJCE6VEVZVYY7S4TUFF2BXEN/ _______________________________________________ Users mailing list -- [email protected] To unsubscribe send an email to [email protected] Privacy Statement: https://www.ovirt.org/privacy-policy.html oVirt Code of Conduct: https://www.ovirt.org/community/about/community-guidelines/ List Archives: https://lists.ovirt.org/archives/list/[email protected]/message/ATR3WHSD6RWLRWUHOQZXVSHSGXV6PTD6/
