AnsweredAssumed Answered

Powershell Command to Change Performance Policies on Cloned Volume

Question asked by Daniel McCurley on Oct 26, 2014

Hi,

 

I've been looking to take the burden off of my Windows 2012 serve cluster for backup snapshots.  Up to this point using Vice Versa and Windows VSS to backup data to a whitebox over 10gig.  Surprisingly effective but drains resources from a file server that is busy serving up files.  I've come up with a way to mount these NTFS iSCSI volumes on a different host using powershell but would like to set these cloned volumes to a non-cached performance policy. The reasoning is that any data that is pulled from these clones won't contribute to cache churn.  I'm hoping there is a flag I can set that will allow me to change the performance policy of a cloned volume.  Up till this point I've only seen that option on creation of new volumes in powershell.

 

Here are the scripts I am using to Mount and Unmount cloned NTFS volumes to another host.  If you use a file based backup solution like Vice Versa this should work well.  Thanks to the code examples I'd seen on Nimble Connect for getting me most of the way there.  Thanks to Technet for the rest.

 

How to create a clone, update iSCSI on windows server, and mount a drive with a specific letter.

 

Connect-NSArray -SystemName 1.1.1.1 -Password ********

Get-NSSnapShot -Volume MainDisk

Get-NSVolume -Name MainDisk | New-NSSnapshot -Name MainDiskClone | New-NSClone -Name MainDiskClone

Add-NSInitiatorGroupToVolume -InitiatorGroup backup-server -Volume MainDiskClone -Access Volume

Update-IscsiTarget

$tar = Get-IscsiTarget -NodeAddress *MainDiskClone*

Connect-IscsiTarget -NodeAddress $tar.NodeAddress

$disk = Get-Disk | ? OperationalStatus -EQ Offline

set-disk -InputObject $disk -IsOffline $false

set-disk -InputObject $disk –IsReadOnly $false

$drivename = gwmi win32_volume -Filter "Label = 'MainDiskClone'"

$drivename.DriveLetter = "V:"

$drivename.put()

 

Unmounting a clone from windows server and destroying it on the Nimble Array

 

Connect-NSArray -SystemName 1.1.1.1 -Password ********

$tardrop = Get-IscsiTarget -NodeAddress *MainDisk*

Disconnect-IscsiTarget -NodeAddress $tardrop.NodeAddress -confirm:$false

Remove-NSVolume MainDiskClone –Force

Get-NSVolume MainDisk | Get-NSSnapShot | Remove-NSSnapShot -Force

 

Hope this can help somebody and if anybody has any interest in revealing or adding the functionality of changing the performance policy for a cloned volume I would be very interested to hear.

 

Thanks,

 

Dan

Outcomes