[ovirt-users] Re: very very bad iscsi performance
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" <pbrown(a)medata.com>
To: "Paolo Bonzini" <pbonzini(a)redhat.com>
Cc: "Nir Soffer" <nsoffer(a)redhat.com>, "users"
<users(a)ovirt.org>, "qemu-block" <qemu-block(a)nongnu.org>,
"Stefan Hajnoczi" <stefanha(a)redhat.com>, "Sergio Lopez Pascual"
<slp(a)redhat.com>, "Mordechai Lehrer" <mlehrer(a)redhat.com>
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