PowerShell ForEach-正在使用的并行文件 [英] PowerShell ForEach -parallel file in use

问题描述

我有一个带有并行循环的简单工作流程，但是在写出结果时遇到错误.因为写输出是并行的.我收到错误消息:

I have a simple workflow with a parallel loop but i run into an error when writing out the result. Because the write-output is parallel. I get the error:

The process cannot access the file because it is being used by another process.

这是我的剧本:

workflow Get-ServerServices 
{
    $srvlst = Get-Content C:\TEMP\srvlst.txt

    foreach -parallel ($srv in $srvlst)
    {
         Get-Service -PSComputerName $srv | Out-File c:\temp\test.txt -Append

    }

}

有什么主意吗?

推荐答案

我建议写出临时文件.您可以执行以下代码:

I would suggest writing out to temporary files. You could do something like the below code:

workflow Get-ServerServices 
{
    #Get the temp path of the context user
    $TempPath = Join-Path -Path $([System.IO.Path]::GetTempPath()) -ChildPath "ServerServices"
    New-Item -Path $TempPath -ItemType Directory # and create a new sub directory
    $srvlst = Get-Content C:\TEMP\srvlst.txt

    foreach -parallel ($srv in $srvlst)
    {
        $TempFileName = [System.Guid]::NewGuid().Guid + ".txt" #GUID.txt will ensure randomness
        $FullTempFilePath = Join-Path -Path $TempPath -ChildPath $TempFileName
        Get-Service -PSComputerName $srv | Out-File -Path $FullTempFilePath -Force #Write out to the random file
    }

    $TempFiles = Get-ChildItem -Path $TempPath
    foreach ($TempFile in $TempFiles) {
        Get-Content -Path $TempFile.FullName | Out-File C:\temp.txt -Append #concatenate all the files
    }

    Remove-Item -Path $TempPath -Force -Recurse #clean up
}

基本上，您将获得临时目录，追加一个新目录，在输出中添加一堆名为文本的GUID，将它们全部连接成一个，然后将其全部删除

Basically you are getting the temp dir, appending a new directory, adding a bunch of GUID named text files with your output, concatenating them all into one, and then removing all of them

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