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我有一个执行大量图像处理的脚本。到目前为止，它是按顺序运行的，只使用一个核心并且需要很长时间。我手头有四个核心。我想同时运行其中四个命令。为了实现这一点，我需要将命令放在一个数组中。这些是原始命令：

convert.exe -density 200 -quality 80 -delete 0 -scene 1  C:\Users\mles\Desktop\ta2014\v33_1_21_Northland.pdf C:\Users\mles\Desktop\ta2014\%03d.jpg
convert.exe -density 200 -quality 80 -delete 0 -scene 22 C:\Users\mles\Desktop\ta2014\v33_22_31_Auckland.pdf C:\Users\mles\Desktop\ta2014\%03d.jpg
convert.exe -density 200 -quality 80 -delete 0 -scene 32 C:\Users\mles\Desktop\ta2014\v33_32_49_Waikato.pdf C:\Users\mles\Desktop\ta2014\%03d.jpg
convert.exe -density 200 -quality 80 -delete 0 -scene 50 C:\Users\mles\Desktop\ta2014\v33_50_62_Whanganui.pdf C:\Users\mles\Desktop\ta2014\%03d.jpg
convert.exe -density 200 -quality 80 -delete 0 -scene 63 C:\Users\mles\Desktop\ta2014\v33_63_69_Manawatu.pdf C:\Users\mles\Desktop\ta2014\%03d.jpg
convert.exe -density 200 -quality 80 -delete 0 -scene 70 C:\Users\mles\Desktop\ta2014\v33_70_75_Wellington.pdf C:\Users\mles\Desktop\ta2014\%03d.jpg
convert.exe -density 200 -quality 80 -delete 0 -scene 76 C:\Users\mles\Desktop\ta2014\v33_76_92_Marlborough.pdf C:\Users\mles\Desktop\ta2014\%03d.jpg
convert.exe -density 200 -quality 80 -delete 0 -scene 93 C:\Users\mles\Desktop\ta2014\v33_93_117_Canterbury.pdf C:\Users\mles\Desktop\ta2014\%03d.jpg
convert.exe -density 200 -quality 80 -delete 0 -scene 118 C:\Users\mles\Desktop\ta2014\v33_118_127_Otago.pdf C:\Users\mles\Desktop\ta2014\%03d.jpg
convert.exe -density 200 -quality 80 -delete 0 -scene 128 C:\Users\mles\Desktop\ta2014\v33_128_141_Southland.pdf C:\Users\mles\Desktop\ta2014\%03d.jpg

到目前为止，我想出了这个：

$array = @()
$array += "convert.exe -density 200 -quality 80 -delete 0 -scene 1  C:\Users\mles\Desktop\ta2014\v33_1_21_Northland.pdf C:\Users\mles\Desktop\ta2014\%03d_test.jpg"
$array += "convert.exe -density 200 -quality 80 -delete 0 -scene 22 C:\Users\mles\Desktop\ta2014\v33_22_31_Auckland.pdf C:\Users\mles\Desktop\ta2014\%03d_test.jpg"
$array += "convert.exe -density 200 -quality 80 -delete 0 -scene 32 C:\Users\mles\Desktop\ta2014\v33_32_49_Waikato.pdf C:\Users\mles\Desktop\ta2014\%03d.jpg"
$array += "convert.exe -density 200 -quality 80 -delete 0 -scene 50 C:\Users\mles\Desktop\ta2014\v33_50_62_Whanganui.pdf C:\Users\mles\Desktop\ta2014\%03d.jpg"
$array += "convert.exe -density 200 -quality 80 -delete 0 -scene 63 C:\Users\mles\Desktop\ta2014\v33_63_69_Manawatu.pdf C:\Users\mles\Desktop\ta2014\%03d.jpg"
$array += "convert.exe -density 200 -quality 80 -delete 0 -scene 70 C:\Users\mles\Desktop\ta2014\v33_70_75_Wellington.pdf C:\Users\mles\Desktop\ta2014\%03d.jpg"
$array += "convert.exe -density 200 -quality 80 -delete 0 -scene 76 C:\Users\mles\Desktop\ta2014\v33_76_92_Marlborough.pdf C:\Users\mles\Desktop\ta2014\%03d.jpg"
$array += "convert.exe -density 200 -quality 80 -delete 0 -scene 93 C:\Users\mles\Desktop\ta2014\v33_93_117_Canterbury.pdf C:\Users\mles\Desktop\ta2014\%03d.jpg"
$array += "convert.exe -density 200 -quality 80 -delete 0 -scene 118 C:\Users\mles\Desktop\ta2014\v33_118_127_Otago.pdf C:\Users\mles\Desktop\ta2014\%03d.jpg"
$array += "convert.exe -density 200 -quality 80 -delete 0 -scene 128 C:\Users\mles\Desktop\ta2014\v33_128_141_Southland.pdf C:\Users\mles\Desktop\ta2014\%03d.jpg"

foreach ($element in $array) {
   $MaxThreads = 4
   While (@(Get-Job | Where { $_.State -eq "Running" }).Count -ge $MaxThreads)
   {  Write-Host "Waiting for open thread...($MaxThreads Maximum)"
      Start-Sleep -Seconds 1
   }

   Start-Job -Scriptblock{ $element }
}

While (@(Get-Job | Where { $_.State -eq "Running" }).Count -ne 0)
{  Write-Host "Waiting for background jobs..."
   Get-Job    #Just showing all the jobs
   Start-Sleep -Seconds 1
}

ForEach ($Job in (Get-Job)) {
   Remove-Job $Job
}

工作开始但立即退出。我想这与我如何在数组中存储命令有关？

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1 回答 1

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您可能想查看工作流，但它们最多会遇到 5 个并发进程。还有几个使用运行空间池和 powershell 以绕过此限制的方式实现多线程的示例。我在这里给出了一个工作示例。

或者，只需将脚本块存储为数组中的脚本块而不是字符串。

$commands = @()
$commands += {echo "test1"}
$commands += {echo "test2"}
$commands += {echo "test3"}
foreach($command in $commands){
    start-job $command
}
于 2014-11-02T23:58:08.927 回答