1 Reply Latest reply on Jan 21, 2020 9:00 AM by LucD

    Speed up Setting custom attributes with Start-Job

    MD_Mo Lurker

      Is there are way to create start-jobs for setting custom attributes. I just started reading about and looking to speed a script. I have about 20k servers that I need to set the attributes for. Here my regular script.



      Connect-VIServer $vCenters


      $pathDev = "C:\Powershell\vCenter\Tags\VMs"

      Set-Location $pathDev

      $CSV = Import-Csv .\VMsAttributes.csv

      foreach ($line in $CSV)


      Set-Annotation -CustomAttribute "Project" -Entity $line.Name -Value $line."Project"

      Set-Annotation -CustomAttribute "Applications Owners" -Entity $line.Name -Value $line."Applications Owners"

      Set-Annotation -CustomAttribute "Responsible Organization" -Entity $line.Name -Value $line."Responsible Organization"

      Set-Annotation -CustomAttribute "Systen Administrators DL" -Entity $line.Name -Value $line."Systen Administrators DL"


      Disconnect-VIServer $vCenters -Confirm:$False

        • 1. Re: Speed up Setting custom attributes with Start-Job
          LucD Guru
          User ModeratorsCommunity WarriorsvExpert

          You can use background jobs to split the work.
          See my Running a background job dive for some of the peculiarities of using PowerCLI in such a background job.


          You will have to split the workload. You can pass a subset of the VMs to each background job.

          You could do that by cluster, or by a range of VM based on their name...

          Your choice.


          Be also aware that there is a limit to the number of background jobs you can start in parallel on a station.

          This depends on the amount of available memory, CPU resources ....

          Also be aware that there will be a load on your vCenter when you launch multiple background jobs in parallel.

          Determining the ideal number of background jobs is partially trial-and-error and partially common sense

          Blog: http://lucd.info | Twitter: @LucD22 | PowerCLI Reference co-author: http://tinyurl.com/hkn4glz