Take the 2-minute tour ×
Server Fault is a question and answer site for professional system and network administrators. It's 100% free, no registration required.

Quick question...

If the option for Independant disks is selected, and made persistent, does thsi now mean I cannot take snapshots of the disk?

Someone has changed the deselected options to delected, so it is now independant and persistent, and I do not know why they would do that? One claim was "performance"?? But there was no prevoious snapshots on the datastore for the VM??

thanks

share|improve this question

1 Answer 1

An Independent persistent disk is a disk that is specifically excluded from Snapshots but otherwise behaves as you would expect. An Independent nonpersistent disk is transient in nature - changes made to the disk are lost when the VM is rebooted.

There is a performance recommendation that says to use independent persistent disks for heavy workload VM's but that really is just to ensure that the overhead associated with snapshotting that disk is eliminated, if the machine has never been and isn't going to be snapshotted then I don't think it makes any measurable difference other than that.

The only difference it should make is that the disk in question will now never be included in snapshots.

share|improve this answer
    
Exactly the right answer. –  Chopper3 Mar 5 '10 at 8:20

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.