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Configuring LLT, GAB, VCSMM, and VXFEN drivers

 To configure LLT, GAB, VCSMM, and VXFEN drivers

1. On the new system, modify the file /etc/sysctl.conf to set the shared memory and other parameter required by Oracle; refer to the documentation: B10766-01, Oracle 10g Installation Guide, for details. The value of the shared memory parameter is put to effect when the system restarts.

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     Note   This does not apply for SUSE.

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2. Edit the file /etc/llthosts on the two existing systems. Using vi or another text editor, add the line for the new node to the file. The file should resemble:

   1 galaxy

   2 nebula

   3 saturn

3. Copy the /etc/llthosts file from one of the existing systems over to the new system. The /etc/llthosts file must be identical on all nodes in the cluster.
4. Create an /etc/llttab file on the new system. For example:

   set-node saturn

   set-cluster 101

   link eth1 eth-[MACID for eth1] - ether - -

   link eth2 eth-[MACID for eth2] - ether - -

   The second line, the cluster ID, must be the same as in the existing nodes.

5. Use vi or another text editor to create the file /etc/gabtab on the new system. It should resemble the following example:

   /sbin/gabconfig -c -nN

   Where N represents the number of systems in the cluster. For a three-system cluster, N would equal 3.

6. Edit the /etc/gabtab file on each of the existing systems, changing the content to match the file on the new system.
7. If you are adding the new node to a single node cluster, then fencing must be enabled and configured on the original node before proceeding tostep 8.

   See Setting up I/O fencing

8. Set up the /etc/vcsmmtab and /etc/vxfendg files on the new system by copying them from one of the other existing nodes:

   # scp galaxy:/etc/vcsmmtab /etc

   # scp galaxy:/etc/vxfendg /etc

9. Run the commands to start LLT and GAB on the new node:

   # /etc/init.d/llt start

   # /etc/init.d/gab start

10. On the new node, start the VXFEN, VCSMM, and LMX drivers. Remove the /etc/vxfenmode file to enable fencing. Use the commands in the order shown:

    # rm /etc/vxfenmode

    # /etc/init.d/vxfen start

    # /etc/init.d/vcsmm start

    # /etc/init.d/lmx start

11. On the new node, start the GMS and ODM drivers. Use the commands in the order shown:

    # /etc/init.d/odm start

12. On the new node, verify that the GAB port memberships are a, b, d, and o. Run the command:

    # /sbin/gabconfig -a

    GAB Port Memberships