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Creating disk groups, volumes, and mount points

To create disk groups, volumes, and mount points for Oracle, review these guidelines. Before you install the Oracle Cluster Ready Services (CRS) and Oracle 10g binaries, you must create storage space for these installations. You need to provide storage for:

• The home directories, CRS_HOME and ORACLE_HOME, for CRS and Oracle binaries. See Identify the directories required for installing Oracle and CRS software:.
• The volumes for Oracle Cluster Registry (OCR) and the VOTE-disk. The volumes should reside on raw device, or in directories in shared disk groups. See Creating OCR and VOTE-disk volumes.

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    Note   The displayed task to create CVM volumes or a directory on CFS for database file storage is covered later in Creating the Oracle database.

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Identifying required directories for CRS and Oracle

Identify the directories required for installing Oracle and CRS software:

Directory	Component
/app	Mountpoint for Oracle/CRS binaries
/app/crshome	CRS_HOME
/app/oracle	ORACLE_BASE
/app/oracle/home	ORACLE_HOME
/oradata	Mountpoint for Oracle database

Preparing $CRS_HOME and $ORACLE_HOME on each node

 To create a file system on local storage for Oracle/CRS binaries (/app)

1. As root user, first create a VxVM local diskgroup, orabindg_hostname:

   # vxdg init orabindg_galaxy Disk_1

2. Create a volume, orabinvol_hostname:

   # vxassist -g orabindg_galaxy make orabinvol_galaxy 12G

3. Create directory, /app

   # mkdir /app

4. Create a filesystem with this volume, orabinvol_hostname

   # mkfs -t vxfs /dev/vx/dsk/orabindg/orabinvol

5. Mount /app

   # mount -t vxfs /dev/vx/dsk/orabindg/orabinvol /app

6. Add an entry for this filesystem in /etc/fstab.

   /dev/vx/dete/orabindg/orabinvol

   /app

   vxfs

   defaults 01

 To prepare $CRS_HOME on each node

1. On each system, log in as "root".
2. Create the directory for CRS_HOME:

   #mkdir -p /app/crshome

3. Change ownership and permissions

   #chown -R oracle:oinstall /app/crshome

   #chmod -R 775 /app/crshome

 To prepare $ORACLE_BASE on each node

1. On each system, log in as "root".
2. Create the directory for ORACLE_BASE:

   #mkdir -p /app/oracle

3. Change ownership and permissions

   #chown -R oracle:oinstall /app/oracle

   #chmod -R 775 /app/oracle

 To prepare $ORACLE_HOME on each node

1. On each system, log in as "root".
2. Create the directory for ORACLE_HOME:

   #mkdir -p /app/oracle/orahome

3. Change ownership and permissions

   #chown -R oracle:oinstall /app/oracle/orahome

   #chmod -R 775 /app/oracle/orahome

Creating OCR and VOTE-disk volumes

The installation of CRS requires predefined locations for the OCR and VOTE-disk components. Whether you create volumes or file system directories, you can add them to the VCS configuration to make them highly available.

 To create a filesystem for OCR and VOTE disks (/ocrvote)

1. As root user, from the CVM master, create a shared VxVM diskgroup

   # vxdg -s init ocrvotedg Disk_2

2. As root user, from CVM master, create volume(s) for ocr and voting disk.

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     Note   Note: For 10.1.0.3, you need to create cfs mount for ocr and raw volume for voting disk. For 10.2.0.1, you need to create raw volumes for ocr as well as voting disk.

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   # vxassist -g ocrvotedg make ocrvol 400M

   # vxassist -g ocrvotedg make vdrvol 400M

3. For raw volumes, also need to change permissions as follows.

   #vxedit -g ocvotedg set user=oracle group=oinstall mode=660 ocrvol

   #vxedit -g ocvotedg set user=oracle group=oinstall mode=660 vdvol

4. Verify that the VCS resources, ocrvote_mnt and ocrvote_voldg, are ONLINE on all systems in the cluster.

   #hares -state ocrvote_mnt

   #hares -state ocrvote_voldg