Parallel job execution in Azure DevOps

azure-pipelines.yml

trigger:
  - '*'

stages:
  - stage: develop
    jobs:
    - job: A
      strategy:
        parallel: 4 
      pool:
        name: 'Default'
      workspace:
        clean: all
      steps:
      - task: PowerShell@2
        displayName: Go1
        inputs:
          targetType: inline
          script: |
            #Start-Sleep -Seconds 15
            #dir -Path env:

            [int]$jobNumber = $env:SYSTEM_JOBPOSITIONINPHASE
            [int]$totalJobs = $env:SYSTEM_TOTALJOBSINPHASE

            $data = 1..100
            $batchSize = $data.Count / $totalJobs
            $jobNumber--
            $skip = $batchSize * $jobNumber
            $batch = $data | Select-Object -Skip $skip -First $batchSize

            Write-Host "batchSize: $batchSize"
            Write-Host "skip: $skip"
            Write-Host "data: $($batch -join ' ')"
          errorActionPreference: stop
    - job: B
      strategy:
        parallel: 2 
      pool:
        name: 'Default'
      workspace:
        clean: all
      steps:
      - task: PowerShell@2
        displayName: Go1
        inputs:
          targetType: inline
          script: |
            #Start-Sleep -Seconds 15
            #dir -Path env:

            [int]$jobNumber = $env:SYSTEM_JOBPOSITIONINPHASE
            [int]$totalJobs = $env:SYSTEM_TOTALJOBSINPHASE

            $data = 1..100
            $batchSize = $data.Count / $totalJobs
            $jobNumber--
            $skip = $batchSize * $jobNumber
            $batch = $data | Select-Object -Skip $skip -First $batchSize

            Write-Host "batchSize: $batchSize"
            Write-Host "skip: $skip"
            Write-Host "data: $($batch -join ' ')"
          errorActionPreference: stop