Powershell脚本运行缓慢

我正在编写一个脚本来检查大约 15 个远程服务器上的版本，但该脚本的执行时间比我预期的要长得多。

$listServers = @("compName1", "compName2", "compName3", ... "compName15")

"" | Out-File C:\temp\javaVersion.txt
"" | Out-File C:\temp\javaVersionLog.txt
$cred = Get-Credential

ForEach ($server in $listServers) 
{
     Measure-Command {$javaVersion = Invoke-Command -ComputerName $server -Credential $cred -Authentication Kerberos -ScriptBlock {Get-WmiObject -Class Win32_Product -Filter "Name like 'Java [0-9]%'" | Select -ExcludeProperty Version}} -ErrorAction SilentlyContinue -ErrorVariable errorOutput
     $errorOutput | Out-File C:\temp\javaVersionLog.txt -Append
     $server + $javaVersion | Out-File C:\temp\javaVersion.txt -Append
 }

根据 Measure-Command 输出，这大约需要 21 秒才能完成。我是否有理由错过该脚本需要这么长时间才能完成？

Edit:

在被其他问题分散注意力后，我终于完成了剧本。

Start-Transcript C:\temp\javaVersion.txt
$listServers = @("compName1", "compName2", "compName3", ... "compName15")
$javaVersVerbose = ""

Invoke-Command -ComputerName $listServers -ScriptBlock {
    $registry = [Microsoft.Win32.RegistryKey]::OpenRemoteBaseKey('LocalMachine', $_);
    $javaKey = $registry.OpenSubKey('SOFTWARE\JavaSoft\Java Runtime Environment');
    $javaVers = $javaKey.GetValue('CurrentVersion');
    $javaVersVerbose = $javaKey.GetValue('Java' + $javaVers.Substring(2, 1) + 'FamilyVersion');
    $nameKey = $registry.OpenSubKey('SYSTEM\CurrentControlSet\Control\ComputerName\ActiveComputerName');
    $name = $nameKey.GetValue('ComputerName');
    $name + " " + $javaVersVerbose | echo
} -ErrorAction SilentlyContinue -ErrorVariable errorOutput

$errorOutput | echo

Write-Host -NoNewLine 'Press any key to continue...'
$null = $Host.UI.RawUI.ReadKey('NoEcho, IncludeKeyDown')

您不需要循环或串行执行此操作。invoke-command需要收集ComputerNames，并且可以并行运行请求。

$listServers = @("compName1", "compName2", "compName3", ... "compName15")
Invoke-Command -throttlelimit 4 -ComputerName $listServers -Credential $cred -Authentication Kerberos -ScriptBlock {Get-WmiObject -Class Win32_Product -Filter "Name like 'Java [0-9]%'" | Select -ExcludeProperty Version}} -ErrorAction SilentlyContinue -ErrorVariable errorOutput

然而，正如 Tim Ferrell 所指出的，您可以使用 Get-WMIObject 远程 ping 服务器，如果您将其作为一项作业来执行，它将并行运行多个请求。

Get-WMIObject Win32_Product  -Filter "Name like 'Java [0-9]%'" -computername $listServers -throttlelimit 4 -asjob |select -excludeproperty version

然后使用 Job cmdlet 接收结果。