I am currently migrating some VM disks from internal drives to multipath iSCSI. I am new to iSCSI and so am wondering about best practices for PVE VM disks hosted on there.
By default I have all VMs set to Discard and SSD emulation, but I am now wondering if those settings make sense on iSCSI...
My servers all run HGST260 enterprise PCIe NVMe drives, mirrored. The drives have great performance, but my guests seem to be limited by queue depth. Are we able to use emulated NVMe devices to increase the parallelization of disk IO, and would this help relative to the standard SCSI devices?
I am wondering if since we're using local ZFS for our VM storage, should we set all Hard Disks to "SSD emulation"?
I know on Windows, this stops things like defrag from running, which kills CoW storage like ZFS. Does it do something similar on linux guests?
Are there any other ZFS best...
Recently I created a disk on VM with SSD Emulation ticked but everytime i click OK, It produced a error like this
Is anyone facing this too? Or it just me? :D
Oh, I'm using PVE 5.2.1 here.