Powershell Script Running Slowly

Question

I\'m writing a script to check the version on about 15 remote servers and the script is taking much longer to execute than I would expect.

$listServers = @(\"com         


        

Answer 1

Yeah, I think using jobs is the way to go. WMI calls can take a long time, especially if you run into a host or two that aren't responding.

Maybe consider something like this:

$listServers = @((1..15 | % {"compName$_"}))
$jobList = @()

$JavaBlock = {
function checkServer ($serverName) {
    $returnValue = Get-WmiObject -computerName $serverName -Class Win32_Product -Credential $cred -Filter "Name like 'Java [0-9]%'" | Select -ExcludeProperty Version
    return $returnValue
}

}

foreach ($server in $listServer) {
    $job = start-job -InitializationScript $JavaBlock -ScriptBlock { checkServer $args } -argumentList $hostname
    $jobList += $job
    while (($jobList | where { $_.state -eq "Running" }).count -ge 30) { start-sleep -s 1 }
}

while (($jobList | | where { $_.state -eq "Running" }).count -ge 1) { start-sleep -ms 500 }

The two while statements control the job flow. The one within the foreach statement throttles the jobs so that only 30 are running at once. The last just waits for all jobs to complete before finishing off.

To gather your results, you can use this:

$jobList | % { $jobResults = Receive-Job $_; write-host $jobResults.result }

The Job object has other properties that might be worth exploring as well.