[pve-devel] scsihw / hotplug integration into GUI

Stefan Priebe - Profihost AG s.priebe at profihost.ag
Wed Aug 15 10:15:49 CEST 2012

Hello list,

   i've cc'd ronnie as he is also interested in a benchmark regarding 
open-iscsi and libiscsi using scsi-generic.

Test Environment:
- Host and Guest Kernel 3.5.0
- qemu-kvm git (1.2) with block and scsi-abort patch
- libiscsi 1.5.0
- virtio-scsi-pci
- scsi-generic

> libiscsi:
rand 4k:
   write: io=10580MB, bw=120079KB/s, iops=30019, runt= 90220msec
   read : io=21741MB, bw=247358KB/s, iops=61839, runt= 90001msec

seq 4m:
   write: io=64828MB, bw=735678KB/s, iops=179, runt= 90235msec
   read : io=30680MB, bw=347345KB/s, iops=84, runt= 90447msec

> open-iscsi:
rand 4k:
   write: io=5814MB, bw=66096KB/s, iops=16524, runt= 90074msec
   read : io=7524MB, bw=85602KB/s, iops=21400, runt= 90009msec
seq 4m:
   write: io=78460MB, bw=890494KB/s, iops=217, runt= 90223msec
   read : io=54388MB, bw=616649KB/s, iops=150, runt= 90316msec

I really want to start integrating this into Proxmox. Dietmar what's 
your opinion? Should i add another autodetection?

Do you have any idea why the sequential speed of 4M blocks is lower than 
with open-iscsi?


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