Re: _ASM_ALLOW_ONLY_RAW_DISKS

  • From: Kevin Jernigan <kevin.jernigan@xxxxxxxxxx>
  • To: k3nnyp@xxxxxxxxx, Seth Miller <sethmiller.sm@xxxxxxxxx>
  • Date: Fri, 17 Oct 2014 09:33:52 -0700

If you're on 11g or higher, you should use Direct NFS (dNFS), not standard NFS. It will provide significantly better performance, better load balancing if you have multiple NICs, and transparent failover if you have multiple NICs and one of the NICs fails...KJ


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On 10/17/14, 5:56 AM, Kenny Payton wrote:

Thanks for your reply, I haven't started any testing yet. Hopefully next week I get an opportunity to dig a little deeper.

On Oct 16, 2014 11:29 PM, "Seth Miller" <sethmiller.sm@xxxxxxxxx <mailto:sethmiller.sm@xxxxxxxxx>> wrote:

    Kenny,

    I'm a little confused by your post. The
    parameter _ASM_ALLOW_ONLY_RAW_DISKS is not required for using ASM
    with files on NFS mounts. The configuration to which you are
    referring is not only common, but the recommended best practice
    from the Oracle documentation.

    Have you started any of your testing yet?

    Seth Miller


    On Sat, Oct 11, 2014 at 9:33 AM, Kenny Payton <k3nnyp@xxxxxxxxx
    <mailto:k3nnyp@xxxxxxxxx>> wrote:

        Anyone running ASM on file systems?  I have a number of
        databases on Netapp and some on local storage but none of them
        are also running ASM.  I’ll be running some tests in the near
        future where I will be limited to NFS.  I’d like to have some
        redundancy in my storage layer in addition to what the NFS
        solution is using on the back end.  I will have access to
        multiple separate NFS arrays and was thinking about using ASM
        redundancy spanning separate NFS mounts ( from separate arrays
        ). This is not a common configuration and I’m not sure how
        supportable this would be considering you have to set a hidden
        parameter to enable ASM to scan files.  I’m curious to hear if
        anyone is actually using this other than just to play around
        on a laptop.


        Thanks,
        Kenny

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