OpsMgr – Authoring performance collection rules for cluster disks – the *right* way.

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Comments (13)
  1. Kevin Holman says:

    But look at all the cool stuff you just learned?  🙂

  2. Kevin Holman says:

    @Trond –

    GREAT question – I don't know – but I will look into this.

  3. Kevin Holman says:

    @RHC – Have you enabled our mount point discovery?

    We will discover and monitor mount points via that method.  However – I do know that our typical perfmon targets don't work – and this shows up in events on the SCOM agent because the workflow is trying to map the discover ID to something in perfmon – and these don't match.  Perfmon shows these as "HardDiskVolume1", etc…. so I'd argue that we need to change the mount point discovery to allow logical disk counters in perfmon to map correctly to these, or find some other way to monitor free space and collect perf data for mount points.  This sounds like a good bug to raise in support and request a hotfix for the MP.  Raising a bug and escalating for a fix is the BEST way to see changes made to any MP.  Without that request being made by the customer, it wont be seen as an impacting issue.

    1. Andreas says:

      Hi Kevin.

      I have written a MP to overcome the limitations regarding mountpoints. I would really appreciate your feedback. Especially I would like to get your feedback regarding cookdown. I tried to implement the rules that cookdown should take place.

      MP can be downloaded here: https://gallery.technet.microsoft.com/SCOM-Management-Pack-for-0afa5515

      Best regards

  4. Kevin Holman says:

    I have raised it as a recommendation.  🙂

    When I say "known issue" I mean it is known by me.

  5. GaryH says:

    Can you try and get this into the next release of the official OS MP so we don't have to do our own custom workarounds for a known issue?

  6. Kevin, brilliant stuff. However, I have a question:

    We urgently need to get some IO monitoring in place for our Hyper-v 2012 hosts. When doing a "discovered inventory" of the class "Cluster Disk" the only thing I get is the quorum disk for my Hyper-V cluster. The data disks show up as "Cluster Shared Volume". In Perfmon, I can't find any instance name to line up with any of the fields in Perfmon (the perfmon ones are typically just numbers from 1 up to the number of CSVs the OS can see). However, I do have some "Cluster CSV*" counters, that have instance names like "Volume2", Volume3" and so on. The CSV counters don't have the exact counters I want though, so i'd really like to use the PhysicalDisk ones.

    The sealed management pack seems to include counters for free space /MB, free space / %, and total size /MB for CSV disks. How can I extend this to include other performance metrics?

  7. RHC says:

    Hi Kevin

    Again a greate post from you! – thank you!

    I followed you article and start collecting a lot of performance data from the cluster disk, but I have one problem – How to I collect performance data from mount points we are using in a cluster?

    We have a lot of big SQL clusters where each cluster resource/SQL instance is buildup of a “anchor disk” with a driver letter and then a lot of mount points on this disk – In this situation I only get performance data from the “anchor disk” that have a drive letter and not from all the mount points – do you have an ide how to solve this?

  8. RHC says:

    Hi Kevin

    Yes we have enabled moint point discovery.

    I will raise it for MS support – thank you a lot for you answer.

  9. Dominique says:


    Does a list of all counters already available exist?

    Should I add all counters in the custom MP attached?

    – Avg. Disk sec/Read

    – Avg. Disk sec/Write

    – I/O Database Reads/Sec

    – I/O Database Reads Average Latency

    – I/O Database Writes/Sec

    – I/O Database Writes Latency

    for SQL databases (SQL MP), I saw these counters in the Exchange MP…



  10. Nhald says:

    Hello Kevin –
    Does this require time to discover cluster disk which I made the rule enabled? If so, how many hours? Thanks!

  11. Kevin Holman says:

    @nhlad – this has nothing to do with cluster disk discovery. This has to do with performance collection.

    Your cluster disks should already be discovered instances. If they aren’t – you need to make sure you have the right MP’s installed and troubleshoot.

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