Topic
3 replies Latest Post - ‏2012-10-07T10:18:20Z by SystemAdmin
Dan_Casale
Dan_Casale
2 Posts
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Pinned topic Shared Storage Pools in VIOS 2.2.1.4 What's the point?

‏2012-10-03T20:37:01Z |
I have read all the documentation I could find on Shared Storage Pools and I thought it would be awesome to replace NFS mounts with this VIOS feature. However, when I put together a test case for two different LPARs, they were not able to identify when the other LPAR made changes (add/delete files). Additional research found a one-liner that indicated additional software was needed on the client LPARs to perform file management.

I think I am missing the point of this feature!

From my SAN I can already attach a single disk to any number of VIO servers. Is there a future direction to add functionality that will keep the disk in-sync across multiple LPARs?
Updated on 2012-10-07T10:18:20Z at 2012-10-07T10:18:20Z by SystemAdmin
  • gcorneau
    gcorneau
    8 Posts
    ACCEPTED ANSWER

    Re: Shared Storage Pools in VIOS 2.2.1.4 What's the point?

    ‏2012-10-04T16:03:29Z  in response to Dan_Casale
    The capability you need is met not with Shared Storage Pools, but with GPFS.

    http://www-03.ibm.com/systems/software/gpfs/index.html

    To my knowledge, GPFS hasn't been tested with SSP disks yet. It certainly works with shared SAN disks (either via dedicated FC, vSCSI or NPIV).

    Glen Corneau
    IBM Power Systems Advanced Technical Skills
  • Dan_Casale
    Dan_Casale
    2 Posts
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    Re: Shared Storage Pools in VIOS 2.2.1.4 What's the point?

    ‏2012-10-04T18:29:53Z  in response to Dan_Casale
    Yes, that is what I discovered. I am still looking for the advantage of doing shared storage pools over direct connect.
    • SystemAdmin
      SystemAdmin
      1744 Posts
      ACCEPTED ANSWER

      Re: Shared Storage Pools in VIOS 2.2.1.4 What's the point?

      ‏2012-10-07T10:18:20Z  in response to Dan_Casale
      Hi,

      You're still looking for the advantage of SSP, here is my opinion :
      - LPM, Live Partition Mobility is working "out of the box" without the need of your SAN team.
      - Snapshot and rollback all backing devices on the Shared Storage Pool, for example I'm using it on rootvg backing device before updating an host.
      - Pre zone/mask lun on the SSP an reduce time needed to setup an lpar.
      - In the future with VIOS 2.2.1.5 or 2.2.2.0 some nice feature will be added :
      - 16 VIO Servers can participate in a shared storage pool.
      - Live Storage Mobility : move backing devices between SSP (VMotion Storage like).

      You can check my blog post if your are interested in :
      http://chmod666.org/index.php/shared-storage-pool-save-your-time-without-the-need-of-san-team/

      http://chmod666.org