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I had to build a 10g RAC where I got 50G OCR/Voting Disk Physical Luns from SAN team with the note that they cannot carved anything less than that in SAN. Is it possible that I can create 1G Partition from each of them and use them so that I can back them easily especially Voting Disk or so. Environment is AIX. If anybody can share the experience. Using Physical LUN as it is not an issue. It is EMC storage.

TIA

Sanjay

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  • Sanjay Mishra at Jan 22, 2010 at 10:01 pm
    Does anybody experience that if I need to create the Partition for OCR/Voting on AIX, it has to be part of Volume group and if the disk is part of Volume group which can be one disk in Volume Group then its PVID can;t be none and thus violates the RAC requirement to have PVID to be none. I know Solaris is not an issue where we have to do a partition so as leave the block 0 to avoid loss of the device at reboot and used the new partitioned slice but Never check it in AIX.

    SA menitoned that it is not possible and so we need to go with all 50G Luns each for OCR/Voting which will be not wastage of 250G space but also can impact IO/backup.

    Any AIX environment which has experience the same.

    Sanjay

    From: Sanjay Mishra
    To: LS Cheng
    Cc: oracle-l@freelists.org
    Sent: Thu, January 21, 2010 5:50:44 PM
    Subject: Re: Raw Logical Partition on AIX for OCR

    Cheng

    So can it be used for OCR/Voting.
    Can I have multiple Partition like if I have 3 Physical Luns, then I can have 1OCR and 1Voting from one LUN and same from second and 1 voting from Third.
    or
    I need to have 5 Physical Lun and create one partition from each and leave rest of the space intact

    TIA

    Sanjay

    From: LS Cheng
    To: smishra_97_at_yahoo.com
    Cc: oracle-l@freelists.org
    Sent: Thu, January 21, 2010 5:45:53 PM
    Subject: Re: Raw Logical Partition on AIX for OCR

    You can use AIX's LVM to create smaller partitions

    Thanks

    --
    LSC

    On Thu, Jan 21, 2010 at 10:38 PM, Sanjay Mishra wrote:

    I had to build a 10g RAC where I got 50G OCR/Voting Disk Physical Luns from SAN team with the note that they cannot carved anything less than that in SAN. Is it possible that I can create 1G Partition from each of them and use them so that I can back them easily especially Voting Disk or so. Environment is AIX. If anybody can share the experience. Using Physical LUN as it is not an issue. It is EMC storage.
    TIA
    Sanjay
    --
    http://www.freelists.org/webpage/oracle-l
  • Amit bansal at Jan 23, 2010 at 1:44 am
    Sanjay,

    I have configured 10gR2 RAC on AIX and our SA was able to provide us 1 GB
    volumes for OCR and Voting disk. Oracle Clusterware installation docs for
    AIX lists down steps to create a volume group and the raw volumes inside it.
    Refer to following

    http://download.oracle.com/docs/cd/B19306_01/install.102/b14201/storage.htm#sthref539

    Regards
    Amit
    http://askdba.org/weblog/
    On Sat, Jan 23, 2010 at 6:01 AM, Sanjay Mishra wrote:

    Does anybody experience that if I need to create the Partition for
    OCR/Voting on AIX, it has to be part of Volume group and if the disk is part
    of Volume group which can be one disk in Volume Group then its PVID can;t be
    none and thus violates the RAC requirement to have PVID to be none. I know
    Solaris is not an issue where we have to do a partition so as leave the
    block 0 to avoid loss of the device at reboot and used the new partitioned
    slice but Never check it in AIX.

    SA menitoned that it is not possible and so we need to go with all 50G Luns
    each for OCR/Voting which will be not wastage of 250G space but also can
    impact IO/backup.

    Any AIX environment which has experience the same.
    Sanjay

    ------------------------------
    *From:* Sanjay Mishra
    *To:* LS Cheng

    *Cc:* oracle-l@freelists.org
    *Sent:* Thu, January 21, 2010 5:50:44 PM

    *Subject:* Re: Raw Logical Partition on AIX for OCR

    Cheng

    So can it be used for OCR/Voting.
    Can I have multiple Partition like if I have 3 Physical Luns, then I can
    have 1OCR and 1Voting from one LUN and same from second and 1 voting from
    Third.
    or
    I need to have 5 Physical Lun and create one partition from each and leave
    rest of the space intact

    TIA
    Sanjay

    ------------------------------
    *From:* LS Cheng
    *To:* smishra_97_at_yahoo.com
    *Cc:* oracle-l@freelists.org
    *Sent:* Thu, January 21, 2010 5:45:53 PM
    *Subject:* Re: Raw Logical Partition on AIX for OCR

    You can use AIX's LVM to create smaller partitions


    Thanks

    --
    LSC
    On Thu, Jan 21, 2010 at 10:38 PM, Sanjay Mishra wrote:

    I had to build a 10g RAC where I got 50G OCR/Voting Disk Physical Luns
    from SAN team with the note that they cannot carved anything less than that
    in SAN. Is it possible that I can create 1G Partition from each of them and
    use them so that I can back them easily especially Voting Disk or so.
    Environment is AIX. If anybody can share the experience. Using Physical LUN
    as it is not an issue. It is EMC storage.

    TIA
  • Sanjay Mishra at Jan 25, 2010 at 2:27 pm
    Thanks Amit. The link says that we can create the Logical Volume but as per Oracle Metalink doc 293819.1
    AIX –
    Prior to installing Oracle CRS, the raw devices that will house the OCR and voting disk files, must be defined and initialized using the following procedure.  Note this procedure uses raw partitions for these files and not shared-concurrent logical volumes.  The latter requires HACMP.
    IS that mean that we cannot use the Raw Logical Volume with OCR/Voting without HACMP

    Sanjay

    ________________________________
    From: amit bansal
    To: smishra_97_at_yahoo.com
    Cc: LS Cheng; oracle-l@freelists.org
    Sent: Fri, January 22, 2010 8:44:03 PM
    Subject: Re: Raw Logical Partition on AIX for OCR

    Sanjay,

    I have configured 10gR2 RAC on AIX and our SA was able to provide us 1 GB volumes for OCR and Voting disk.  Oracle Clusterware installation docs for AIX lists down steps to create a volume group and the raw volumes inside it. Refer to following

    http://download.oracle.com/docs/cd/B19306_01/install.102/b14201/storage.htm#sthref539

    Regards
    Amit
    http://askdba.org/weblog/

    On Sat, Jan 23, 2010 at 6:01 AM, Sanjay Mishra wrote:

    Does anybody experience that if I need to create the Partition for OCR/Voting on AIX, it has to be part of Volume group and if the disk is part of Volume group which can be one disk in Volume Group then its PVID can;t be none and thus violates the RAC requirement to have PVID to be none. I know Solaris is not an issue where we have to do a partition so as leave the block 0 to avoid loss of the device at reboot and used the new partitioned slice but Never check it in AIX.
    SA menitoned that it is not possible and so we need to go with all 50G Luns each for OCR/Voting which will be not wastage of 250G space but also can impact IO/backup.

    Any AIX environment which has experience the same.

    Sanjay

    ________________________________
    From: Sanjay Mishra
    To: LS Cheng

    Cc: oracle-l@freelists.org
    Sent: Thu, January 21, 2010 5:50:44 PM

    Subject: Re: Raw Logical Partition on AIX for OCR



    Cheng

    So can it be used for OCR/Voting.
    Can I have multiple Partition like if I have 3 Physical Luns, then I can have 1OCR and 1Voting from one LUN and same from second and 1 voting from Third.
    or
    I need to have 5 Physical Lun and create one partition from each and leave rest of the space intact

    TIA
    Sanjay


    ________________________________
    From: LS Cheng
    To: smishra_97_at_yahoo.com
    Cc: oracle-l@freelists.org
    Sent: Thu, January 21, 2010 5:45:53 PM
    Subject: Re: Raw Logical Partition on AIX for OCR

    You can use AIX's LVM to create smaller partitions


    Thanks

    --
    LSC



    On Thu, Jan 21, 2010 at 10:38 PM, Sanjay Mishra wrote:

    I had to build a 10g RAC where I got 50G OCR/Voting Disk Physical Luns from SAN team with the note that they cannot carved anything less than that in SAN. Is it possible that I can create 1G Partition from each of them and use them so that I can back them easily especially Voting Disk or so. Environment is AIX. If anybody can share the experience. Using Physical LUN as it is not an issue. It is EMC storage.
    TIA
    Sanjay
    --
    http://www.freelists.org/webpage/oracle-l

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postedJan 21, '10 at 9:38p
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