zfs plugin suggestion

I've tested zfs plugin(comstart iscsi).It's a great feature.After test it .I have some suggestion

1. Add -s optional parameter to create thin provisioned zvol on zvol create process.

2.It seems have problem to create second disk on the same vms.Because it use the same disk name(vm-disk-103-1) with second disk creation.

3.Snapshot with ram data.Maybe create another zvol to store snapshot ram data?