'Re: [Ocfs2-users] IO size and cluster size'

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List:       ocfs2-users
Subject:    Re: [Ocfs2-users] IO size and cluster size
From:       Herbert van den Bergh <herbert.van.den.bergh () oracle ! com>
Date:       2011-12-19 17:00:09
Message-ID: 4EEF6D99.6080100 () oracle ! com
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You can find the average I/O size in iostat -xk output.

Thanks,
Herbert.

On 12/19/11 7:21 AM, Pravin K Patil wrote:
> Hi All,
>  
> how can I determine the size of each I/O? does it depend on the
> cluster size? block size? will it be different for each file system if
> each of those have different cluster size?
> I am just trying to understand very high I/O wait on our oracle RAC
> DB, where as we dont have it on another server with similar load. if
> the DB need 4K will it fetch only 4K?
> on side note, I know in ZFS it pulls the I/O of the size equal to
> record size (which can be co-related to clsuter size to some extent).
>  
> Regards,
> Pravin
>
>
> _______________________________________________
> Ocfs2-users mailing list
> Ocfs2-users@oss.oracle.com
> http://oss.oracle.com/mailman/listinfo/ocfs2-users

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    You can find the average I/O size in iostat -xk output.<br>
    <br>
    Thanks,<br>
    Herbert.<br>
    <br>
    On 12/19/11 7:21 AM, Pravin K Patil wrote:
    <blockquote
cite="mid:CAB+pmO2fpd-78TwJYQhYBe14Sdy++ho9FWT9wj7gZb+njW8neA@mail.gmail.com"
      type="cite">
      <div>Hi All,</div>
      <div>&nbsp;</div>
      <div>how can I determine the size of each I/O? does it depend on
        the cluster size? block size? will it be different for each file
        system if each of those have different cluster size?</div>
      <div>I am just trying to understand very high I/O wait on our
        oracle RAC DB, where as we dont have it on another server with
        similar load. if the DB need 4K will it fetch only 4K?</div>
      <div>on side note, I know in ZFS it pulls the I/O of the size
        equal to record size (which can be co-related to clsuter size to
        some extent).</div>
      <div>&nbsp;</div>
      <div>Regards,</div>
      <div>Pravin</div>
      <br>
      <fieldset class="mimeAttachmentHeader"></fieldset>
      <br>
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