Hello,
We are testing setup using VM (FreeNAS) with Disk passthrough (via FC on Storage).
Current VM seetings are:
- cpu: qemu64
- scsihw: virtio-scsi-pci
- LUN passthrough : virtio2: /dev/disk/by-id/dm-uuid-mpath-331402ec001f4fc
- virtio drive cache: none
My question is there any recommended setting that could influence IO perfromance:
- what 'scsihw' controller,
- what cache settings are best when passthrough is used,
cache=<directsync | none | unsafe | writeback | writethrough>
- iothread on/off?
We are testing setup using VM (FreeNAS) with Disk passthrough (via FC on Storage).
Current VM seetings are:
- cpu: qemu64
- scsihw: virtio-scsi-pci
- LUN passthrough : virtio2: /dev/disk/by-id/dm-uuid-mpath-331402ec001f4fc
- virtio drive cache: none
My question is there any recommended setting that could influence IO perfromance:
- what 'scsihw' controller,
- what cache settings are best when passthrough is used,
cache=<directsync | none | unsafe | writeback | writethrough>
- iothread on/off?