避免对同一台计算机进行多次WMI调用？

Question

我在使用Powershell的许多远程计算机上查询WMI类。

我有一个非常有效以下，但由于做任何远程计算机需要一定的时间，我希望尽量减少：

$file = Get-Content c:\temp\bitlocker\non-compliant-wksn1.txt 
foreach ($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" 
    } 
} 

正如你可以从代码中看到，我使2个远程调用从Win32_ComputerSystem获得2个值，3个远程调用从Win32_TPM获得3个值。是否有可能采取这5个远程调用，并以某种方式将它们减少到2个远程调用（每个类一个），它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

每个调用，为你注意，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** 

反而得到完整的WMI对象在一个呼叫，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，只从该对象获得所需的属性：

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