Powershell Runspace not expected output (miss understanding?)

PowerShell Help
1

[pre]

$ScriptBlock = {
Param (
$Vm,
$vc,
$session)
$VCenter = Connect-VIServer -Server $vc -session $session -force
$status = Get-VM $Vm

Write-host $status.Name

if ($status.PowerState -eq “PoweredOff”)
{
$Clone = ‘_2.2’

$NewVM = $Vm + $Clone
Write-host $NewVM

}

}

$Results = @()
$Throttle = 5 #threads
$sesssionstate = [System.Management.Automation.Runspaces.InitialSessionState]::CreateDefault()
$sesssionstate.ImportPSModule(“Vmware.VimAutomation.Core”)
$RunspacePool = [RunspaceFactory]::CreateRunspacePool(1, $Throttle, $sesssionstate, $host)
$RunspacePool.Open()
$Jobs = @()

$Vms = gc .\vmlist.txt
Foreach ($Vm in $Vms)
{
#Start-Sleep -Minutes 1
$Job = [powershell]::Create().AddScript($ScriptBlock).AddArgument($Vm).AddArgument($con.Name).AddArgument($con.SessionId)
$Job.RunspacePool = $RunspacePool
$Jobs += New-Object PSObject -Property @{
Job = $Job
Result = $Job.BeginInvoke()
}

}

while ($Jobs -Contains $false){}

foreach($Job in $jobs)
{
$results+=$Job.Job.EndInvoke($job.Result)
$Job.Job.Dispose()
}

 

$results

[/pre]

Input :

======

INTCL2K8
INTCL2K82
INTCL2k83

Output:

=============

PS C:\Users\Administrator\Desktop> .\tests.ps1
INTCL2K8
INTCL2K8_2.2
INTCL2K82
INTCL2K82_2.2
INTCL2k83
INTCL2K83_2.2
PS C:\Users\Administrator\Desktop> .\tests.ps1
INTCL2K82
INTCL2K8
INTCL2K82_2.2
INTCL2K8_2.2
INTCL2k83
INTCL2K83_2.2
PS C:\Users\Administrator\Desktop> .\tests.ps1
INTCL2K82
INTCL2K8
INTCL2k83
INTCL2K82_2.2
INTCL2K8_2.2
INTCL2K83_2.2

 

My understanding is runspace take input sequentially and run separately.but the output is not sequential. is it because of runtime different and output which one complete first?

The second doubt is how the output “_2.2” VMs comes after one if the thread is running independently. is the code wrong?

the output should be always like this

INTCL2K8
INTCL2K8_2.2
INTCL2K82
INTCL2K82_2.2
INTCL2k83
INTCL2K83_2.2

 

 

2

With parallel processing, the order of the output is random.

3

[quote quote=195476]With parallel processing, the order of the output is random.

[/quote]
Thanks for response, still i cant understand the “with parallel processing output is random” because the script block has the write-host to output one after another . how the “_2.2” output comes before respective input INTCLWK8. How do i ensure the thread is running independently?

 

4

I know write-host can have a funny timing when used along with other kinds of output. The implied running of format-table adds different kinds of weird delays.

[pscustomobject]@{message = "first"}; write-host second


second
message
-------
first