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  • 1.  LPM across Datacenter

    Posted Thu August 24, 2023 10:27 AM

    What are the potential pitfalls for LPMing across Datacenter, if customer has synchronous storage replication set up and dark fiber between datacenters.

    Thanks 



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    Jayesh Patel
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  • 2.  RE: LPM across Datacenter

    Posted Fri August 25, 2023 01:45 AM

    Hi Jayesh,

    I did a test on this matter (two storage systems accross datacentres, synchronous replication, different SAN fabrics connected to Power boxes ) and asked IBM why it failed. They said LPM expects SAN fabric and storage ports to be the same, so I suppose LPM could be improved to support this scenario. It would be great if IBM could make that happen!



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    Ivan Tuda
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    Original Message


  • 3.  RE: LPM across Datacenter

    Posted Mon August 28, 2023 02:54 AM
    Edited by Satid Singkorapoom Mon August 28, 2023 02:56 AM

    Dear Ivan

    The solution described in this IBM redbook may help address the issue you encountered : IBM SAN Volume Controller Stretched Cluster with PowerVM and PowerHA at https://redbooks.ibm.com/abstracts/sg248142.html



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    Education is not the learning of facts but the training of the mind to think. -- Albert Einstein.
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    Satid S.
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    Original Message


  • 4.  RE: LPM across Datacenter

    Posted Fri August 25, 2023 07:47 AM

    Hi Jayesh, 

    Once the conditions for LPM are met, the primary challenge in performing LPM across Datacenters is that the LPAR continues to operate with the disks located in the other, remote Datacenter (lowerperformance). This issue can be circumvented by employing a Hyperswap solution (applicable for IBM DS8000 or IBM Flash Systems) or a Stretched Cluster for SVC.



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    Nicolae Chirea
    System architect
    Saytel Informatica SL
    Madrid
    +34607868409
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    Original Message


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