Search host for No virtual machines is slow.

[CITITECHS]

Community

I'd like to improve the performance on the following code. Takes over 2 hours to run. I believe the reason its so slow is because of Get-VM. I once saw a Get-View on how to improve Get-VM performance but am not exactly sure how to utilize it. The script searches all the host with in virtual center and produces a list of host with no Virtual Machines. Id like to pull the CPU Flags also of each host returned so I can match like processors if possible.

Thanks

$vcs = @()

$vcs += connect-viserver server01

$vcs += connect-viserver server02

$vcs += connect-viserver server03

$vcs += connect-viserver server04

$allhost = Get-VMHost -Server $vcs

foreach ($virtualhost in $allhost) {

if (-not (get-vmhost -Server $vcs $virtualhost | Get-VM -Server $vcs )) {echo "$virtualhost"}}

Disconnect-VIServer -Confirm:$false

[LucD · Accepted solution]

Do you have more than 1 Virtual Center in your environment ?

If yes, you can provide them all at once as input to the Connect-VIServer cmdlet as an array.

With the following code you should be able to list all the ESX servers that have no guests defined on them together with the CPU masks for each ESX server.

$vcs = Connect-VIServer -Server <VC-server-1>,<VC-server-2>,...,<VC-server-n>

$allhost = Get-View -ViewType HostSystem -Server $vcs
foreach($virtualhost in $allhost){
	Write-Host $virtualhost.Name
	if($virtualhost.vm.count -eq 0){
		Write-Host "==> No guest defined" -foregroundcolor red
	}
	foreach($cpuInfo in $virtualhost.Hardware.CpuFeature){
		Write-Host "CPU Level" ("{0:x}" -f $cpuInfo.Level)
		Write-Host "`tEax:" $cpuInfo.Eax
		Write-Host "`tEbx:" $cpuInfo.Ebx
		Write-Host "`tEcx:" $cpuInfo.Ecx
		Write-Host "`tEdx:" $cpuInfo.Edx
	}
}