3 Replies Latest reply: Mar 15, 2013 2:35 PM by djwillia-Oracle RSS

    Oracle 11gR2 RAC Installation - ASM Disks - Need advice on configurations

    992447
      Hi Guys
      How many disks are needed for Voting, Data, Log and Failover. Each should be in a seperate group or it can be in a single group of disk. Please advice. Thanks.
        • 1. Re: Oracle 11gR2 RAC Installation - ASM Disks - Need advice on configurations
          LaserSoft
          Hi Friend,

          Option 1 :

          If Oracle Clusterware is used for implementing normal redundancy. We require the following for failover purpose also.

          1. Two OCR files - 280 MB each
          2. Three Voting Disks - 280 MB each

          Total - 1.4 GB approx

          Option 2 :

          Oracle recommends that the disk used for the file system be on a RAID. When you use external redundancy the minimum requirement is One OCR and One Voting Disk with 280 MB each.


          Choices :

          1. External Redundancy - > Minimum No Of Disks (1) - > One OCR (280 MB) and One Voting Disk (280 MB) -> 580 MB
          2. Normal Redundancy - > Minimum No Of Disks (3) - > Two OCR (560 MB) and Three Voting Disk (840 MB) -> 1.4 GB
          3. High Redundancy - > Minimum No Of Disks (5) - > Three OCR (840 MB) and Five Voting Disk (1.4 GB) -> 2.3 GB

          So, Choose based on redundancy...

          Hope it helps..

          Note : Use ASM for storing above files..

          Thanks
          LaserSoft
          • 2. Re: Oracle 11gR2 RAC Installation - ASM Disks - Need advice on configurations
            992447
            Hi

            I have configured 1gb for voting, 10gb for log and 25gb for data. These 3 disk i am selecting during the GRID installation. I choose the external redudancy. Is this fine.

            Is there data and log to be selected during db installation or we can select during grid installation itself.

            Is it when i select external redudancy i have to opt only for voting only.

            Thanks.
            • 3. Re: Oracle 11gR2 RAC Installation - ASM Disks - Need advice on configurations
              djwillia-Oracle
              Hi--

              In the documentation, you will find a full chapter full of more topics than you want to read about subjects like these, including a few that may answer your questions, such as this:

              http://docs.oracle.com/cd/E11882_01/install.112/e22489/storage.htm#CDEEBBHE
              http://docs.oracle.com/cd/E11882_01/install.112/e22489/storage.htm#CDEFGCFC

              Hope that helps...