Hey Northman,
You will need to compare the snapshot creation date to the current date to calculate the snapshot age. Here's a script that will calculate the snapshot age based on a retention variable in days and display the commands that you "would" run if you wanted to delete the snapshots. I'd advise you thoroughly check the results "before" you delete any snapshots. Note that this explicitly filters out any snapshots used for SnapMirror baseline transfers.
Param(
[Parameter(Mandatory = $True, HelpMessage = "The cluster name or IP Address")]
[String]$Cluster,
[Parameter(Mandatory = $True, HelpMessage = "The number of Days to retain the snapshots")]
[Int]$RetentionDays,
[Parameter(Mandatory = $True, HelpMessage = "The Credential to authenticate to ONTAP")]
[System.Management.Automation.PSCredential]$Credential
)
#'------------------------------------------------------------------------------
#'Connect to the cluster.
#'------------------------------------------------------------------------------
Try{
Connect-NcController -Name $Cluster -Credential $Credential | Out-Null
}Catch{
Write-Warning -Message $("Failed connecting to cluster ""$Cluster"". Error " + $_.Exception.Message)
Exit -1
}
#'------------------------------------------------------------------------------
#'Enumerate all Snapshots.
#'------------------------------------------------------------------------------
Try{
$snaps = Get-NcSnapshot -ErrorAction Stop
}Catch{
Write-Warning -Message $("Failed Enumerating Snapshots on Cluster ""$Cluster"". Error " + $_.Exception.Message)
Exit -1
}
#'------------------------------------------------------------------------------
#'Filter out any snapshots with dependancies for SnapMirror etc.
#'------------------------------------------------------------------------------
$snapshots = $snaps | Where-Object {$_.Dependency -eq $Null}
$currentDate = Get-Date
$retention = $($RetentionDays * (60 * 60 * 24))
#'------------------------------------------------------------------------------
#'Display the command to delete the snapshot.
#'------------------------------------------------------------------------------
ForEach($snapshot In $snapshots){
$created = Get-Date -Date $snapshot.Created
$age = New-TimeSpan -Start $created -End $currentDate
If($age.TotalSeconds -ge $retention -And $snapshot.Name -notlike "snapmirror.*"){
Write-Host $("snapshot delete -vserver " + $snapshot.Vserver + " -volume " + $snapshot.Volume + " -snapshot " + $snapshot.Name)
}
}
#'------------------------------------------------------------------------------
Usage:
PS C:\Scripts\PowerShell\Projects\DeleteAgedSnapshots> $Credentials = Get-Credential
PS C:\Scripts\PowerShell\Projects\DeleteAgedSnapshots> .\DeleteAgedSnapshots.ps1 -Cluster cluster1.testlab.local -RetentionDays 7 -Credential $Credentials
Hope that gives you some ideas. It wouldn't be much effort to add the code to delete the snapshots
/Matt
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