PowerShell 7.3 - implementing Using ForEach-Object and Background Jobs for Parallel Processing
I'm experimenting with I'm trying to process large sets of data in parallel using PowerShell 7.3, but I'm running into issues when using `ForEach-Object` combined with background jobs. I want to read a list of items from a CSV file and perform some processing on each item without blocking the main thread. My current approach looks like this: ```powershell $items = Import-Csv -Path 'C:\data\items.csv' $jobs = @() $items | ForEach-Object -Parallel { $item = $_ # Simulate some processing work Start-Sleep -Seconds 5 "Processed: $($item.Name)" } -ThrottleLimit 5 ``` However, I'm working with a `ForEach-Object : want to bind argument to parameter 'InputObject' because it is null` behavior. I've verified that my CSV file loads correctly and contains data. I suspect it might be related to how I'm referencing the `$_` variable within the script block. I've also tried using `Start-Job` to run each item in a separate job, but I wasn't able to capture the output effectively. Here's my alternative attempt: ```powershell $items = Import-Csv -Path 'C:\data\items.csv' $jobs = @() foreach ($item in $items) { $jobs += Start-Job -ScriptBlock { param($data) Start-Sleep -Seconds 5 "Processed: $($data.Name)" } -ArgumentList $item } $jobs | Receive-Job -Wait ``` In this case, I get no output because `Receive-Job` doesn’t seem to return anything. I've also looked into running `Get-Job` to see if the jobs are still running or completed, but the output is not what I expect. I need to debug why I'm not able to retrieve the output consistently while still achieving parallelism. Any insights on best practices for handling this situation or solutions to the errors I'm working with would be greatly appreciated! Any advice would be much appreciated.