d.ohlin

Update on this for anyone else who comes along down the road. I'm not sure where the issue here lies with sync=standard on the dataset backing the ESXi shared storage...I suspect something with Unraid given the sheer size/age/development of something like vSphere, but I cannot prove that. In any case, I ended up running a "zfs set sync=always [pool_name]/[dataset_name]" and that did the trick for me here. I now see lots of writes to the log device and am seeing close-enough speeds to what I had before local disk performance wise, while hopefully being a little more protected VM-integrity wise.