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Re: [Qemu-devel] slow speed for virtio-scsi since qemu 2.2
From: |
Alexandre DERUMIER |
Subject: |
Re: [Qemu-devel] slow speed for virtio-scsi since qemu 2.2 |
Date: |
Mon, 16 Feb 2015 12:06:24 +0100 (CET) |
H Stefan,
only for write ? or also read ?
I'll try to reproduce on my test cluster.
----- Mail original -----
De: "Stefan Priebe" <address@hidden>
À: "qemu-devel" <address@hidden>
Envoyé: Dimanche 15 Février 2015 19:46:12
Objet: [Qemu-devel] slow speed for virtio-scsi since qemu 2.2
Hi,
while i get a constant random 4k i/o write speed of 20.000 iops with
qemu 2.1.0 or 2.1.3. I get jumping speeds with qemu 2.2 (jumping between
500 iops and 15.000 iop/s).
If i use virtio instead of virtio-scsi speed is the same between 2.2 and
2.1.
Is there a known regression?
Greets,
Stefan
- [Qemu-devel] slow speed for virtio-scsi since qemu 2.2, Stefan Priebe, 2015/02/15
- Re: [Qemu-devel] slow speed for virtio-scsi since qemu 2.2,
Alexandre DERUMIER <=
- Re: [Qemu-devel] slow speed for virtio-scsi since qemu 2.2, Paolo Bonzini, 2015/02/16
- Re: [Qemu-devel] slow speed for virtio-scsi since qemu 2.2, Stefan Priebe - Profihost AG, 2015/02/16
- Re: [Qemu-devel] slow speed for virtio-scsi since qemu 2.2, Paolo Bonzini, 2015/02/16
- Re: [Qemu-devel] slow speed for virtio-scsi since qemu 2.2, Stefan Priebe - Profihost AG, 2015/02/16
- Re: [Qemu-devel] slow speed for virtio-scsi since qemu 2.2, Paolo Bonzini, 2015/02/16
- Re: [Qemu-devel] slow speed for virtio-scsi since qemu 2.2, Stefan Priebe, 2015/02/16