[pve-devel] scsihw / hotplug integration into GUI

Stefan Priebe - Profihost AG s.priebe at profihost.ag
Mon Aug 13 12:42:34 CEST 2012


Am 13.08.2012 12:19, schrieb Alexandre DERUMIER:
>>> But scsi-block needs at least the following patch as it misses some
>>> implemtations. Otherwise you can't start a hd with scsi-block.
> (yes, I want to said when qemu-kvm 1.2 will be release)
>
>> - but scsi-generic seem faster (but need guest 3.4 ?)
>>> Will check / recheck this.
> In fact, virtio-scsi drivers are only available since kernel 3.4.

OK so scsi-generic can't work before ;-) But then we can do 
autodetection. If somebody has scsihw: virtio-scsi-pci the scsi-generic 
should be available.

> Can you try:
> lsi controller + libiscsi + scsi-generic   vs scsi-block
> lsi controller + open-scsi (host) + scsi-generic  vs scsi-block
NO real difference lsi is always SLOW (around 2000-5000 max iops)

> virtio-scsi controller + libiscsi + scsi generic  vs scsi-block

scsi-block is the same performance as scsi-hd (maxed 20.000 iops) vs. 
50.000 iops with scsi-generic.

> virtio-scsi controller + open-scsi (host) + scsi-generic  vs scsi-block
I can't get that running as i don't know how to pass the open-iscsi 
device to the guest.

Stefan


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