避免对同一台计算机进行多次 WMI 调用？

Question

我正在使用 Powershell 查询许多远程计算机上的 WMI 类。

我有以下效果很好，但由于对远程计算机执行任何操作都需要一些时间，我希望将其最小化：

$file = Get-Content c:\temp\bitlocker\non-compliant-wksn1.txt
foreach ($ComputerName in $file) {
    if (Test-Connection -ComputerName $ComputerName -Quiet) {
        $Hostname = (Get-WmiObject -Class Win32_ComputerSystem -ComputerName $ComputerName).Name
        $model = (Get-WmiObject -Class Win32_ComputerSystem -ComputerName $ComputerName).Model
        $OS = (Get-WmiObject -Class Win32_OperatingSystem -ComputerName $ComputerName).Version
        $TpmActivate = (Get-WMIObject -Namespace "root/CIMV2/Security/MicrosoftTpm" -query "SELECT * FROM Win32_TPM" -ComputerName $ComputerName).IsActivated_InitialValue
        $TpmEnabled = (Get-WMIObject -Namespace "root/CIMV2/Security/MicrosoftTpm" -query "SELECT * FROM Win32_TPM" -ComputerName $ComputerName).IsEnabled_InitialValue
        $TpmOwned = (Get-WMIObject -Namespace "root/CIMV2/Security/MicrosoftTpm" -query "SELECT * FROM Win32_TPM" -ComputerName $ComputerName).IsOwned_InitialValue
        $Encrypted = (Get-WMIObject -Namespace "root/CIMV2/Security/MicrosoftVolumeEncryption" -query "SELECT * FROM Win32_EncryptableVolume WHERE DriveLetter='C:'" -ComputerName $ComputerName).ProtectionStatus
        write-host $ComputerName "`t" $Hostname "`t" $model "`t" $OS "`t" $TpmActivate "`t" $TpmEnabled "`t" $TpmOwned "`t" "C:" "`t" $Encrypted
        }
    else {
        write-host $Computername "`t" "Offline"
    }
}

从代码中可以看出，我进行了 2 次远程调用以从 Win32_ComputerSystem 获取 2 个值，并进行 3 次远程调用以从 Win32_TPM 获取 3 个值。是否可以接受这 5 个远程调用并以某种方式将它们减少为 2 个远程调用（每个类一个），返回我需要的所有信息并将它们存储在我的变量中（希望这会加快速度）？

TIA

Answer 1

您注意到，这些调用中的每一个都会进行远程调用：

$Hostname = (Get-WmiObject -Class Win32_ComputerSystem -ComputerName $ComputerName).Name
$model = (Get-WmiObject -Class Win32_ComputerSystem -ComputerName $ComputerName).Model
$OS = (Get-WmiObject -Class Win32_OperatingSystem -ComputerName $ComputerName).Version**strong text**

而是在一次调用中获取完整的 WMI 对象，然后提取所需的属性：

$c = Get-WmiObject -Class Win32_ComputerSystem -ComputerName $ComputerName
$Hostname = $c.Name
$model = $c.Model
$OS = $c.Version

更好的是，只从该对象获取所需的属性：

$c = Get-WmiObject -Query 'select Name, Model, Version from Win32_ComputerSystem' -ComputerName $ComputerName
$Hostname = $c.Name
$model = $c.Model
$OS = $c.Version