Query VirtualMachines

published: September 24, 2023 author: Tinu tags: PowerShell categories: VMware

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Table of Contents

Table of Contents PowerCLI

• Table of Contents
• PowerCLI
  • Get-View vs. Get-VM
  • Fast listing of old Snapshots
• See also

PowerCLI

Get-View vs. Get-VM

The performance with Get-View is much better than Get-VM:

Connect-ViServer -Server "vcenter.example.com"

$Stopwatch = [System.Diagnostics.Stopwatch]::new()
$Stopwatch.Start()

$OverheadVMs = Get-VM
$OverheadVMs | Get-Snapshot | Select-Object -Property VM, Name, Description

$Stopwatch.Stop()
$Stopwatch.Elapsed.TotalSeconds

Output

0.8237531 seconds

$Stopwatch = [System.Diagnostics.Stopwatch]::new()
$Stopwatch.Start()

$FastVMs = Get-View -ViewType VirtualMachine
$FastVMs | Select-Object -Property @{N='VM';E={$PSItem.Name}},
 @{N='Description';E={$PSItem.Snapshot.RootSnapshotList[0].Description}}, 
 @{N='Snapshot';E={$PSItem.Snapshot.RootSnapshotList[0].Name}} | Where-Object Snapshot

$Stopwatch.Stop()
$Stopwatch.Elapsed.TotalSeconds

Output

0.1823357 seconds

Fast listing of old Snapshots

$Stopwatch = [System.Diagnostics.Stopwatch]::new()
$Stopwatch.Start()

$FastVMs  = Get-View -ViewType VirtualMachine -Filter @{'Config.Template' = 'false'; 'Snapshot' = '.*'}
$Snapshot = $FastVMs | ForEach-Object {
    $CreateTime = Get-Date ($_.Snapshot.RootSnapshotList[0].CreateTime)
    [PSCustomObject][Ordered] @{
        CreateTime       = Get-Date ($CreateTime) -Format 'yyyy-MM-dd HH:mm:ss'
        VMName           = $_.Name
        Snapshot         = $_.Snapshot.RootSnapshotList[0].Name -replace '%2f', '/'
        Description      = $_.Snapshot.RootSnapshotList[0].Description
        TotalDays        = [Math]::Round((New-TimeSpan -Start $CreateTime -End (Get-Date)).TotalDays,0)
        ChildSnapshot    = $_.Snapshot.RootSnapshotList[0].ChildSnapshotList
        ChildDescription = $_.Snapshot.RootSnapshotList[0].ChildSnapshotList.Description
        ChildCreateTime  = $_.Snapshot.RootSnapshotList[0].ChildSnapshotList.CreateTime
    }
} | Sort-Object CreateTime 
$Snapshot.Where( {$_.Description -notmatch 'do not delete' -and $_.TotalDays -gt $day} ) | Format-Table -AutoSize

$Stopwatch.Stop()
$Stopwatch.Elapsed.TotalSeconds

See also

API Reference on VMware Developper Documentation.

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