Automation with Power

Power Business Continuity and Automation

Connect, learn, and share your experiences using the business continuity and automation technologies and practices designed to ensure uninterrupted operations and rapid recovery for workloads running on IBM Power systems. 


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  • 1.  JFS2 inline logs and PowerHA

    Posted 07/14/09 07:19 PM

    Originally posted by: Karl_Milliken


    In the HACMP Admin Guide it says that:
    "Note that Reliable NFS Server functionality is supported only with JFS2 file systems with external logs (jfs2logs). File Systems with embedded logs are not supported."

    Is this still true? I had heard a rumor that inline logs are now supported with reliable NFS, the the manual had not been updated.
    Does anyone know?
    #PowerHA-(Formerly-known-as-HACMP)-Technical-Forum
    #PowerHAforAIX


  • 2.  Re: JFS2 inline logs and PowerHA

    Posted 07/22/09 08:35 AM

    Originally posted by: Claudio


    Hello Karl,
    JFS2 inline logs have been supported by PowerHA for quite some time.
    However you must be careful when you also configure NFS under PowerHA.

    In case of NFSv2/v3 you should instead use a jfslog or jfs2log to
    exploit the 2-node highly available NFS server function (search for
    the string "tell NFS" in the cl_deactivate_vgs script for details).

    While for NFSv4 my understanding is that PowerHA will rely instead
    on the Stable Storage Path.

    Thanks, Claudio.
    #PowerHA-(Formerly-known-as-HACMP)-Technical-Forum
    #PowerHAforAIX


  • 3.  Re: JFS2 inline logs and PowerHA

    Posted 07/22/09 02:54 PM

    Originally posted by: Karl_Milliken


    Thanks Claudio. Yes, I see, the cl_deactivate_vgs script uses the jfs2log LV to store the dupcache entries. So the Reliable NFS feature will not work with embedded logs.
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