How to Prepare the Sun Cluster Nodes

For the UDLM software to run correctly, sufficient shared memory must be available on all cluster nodes. See the OPS CD for all installation instructions. To prepare the Sun Cluster nodes, you must ensure that:

• The Oracle user account and the dba group are set up correctly.

• The system is configured to support the shared memory requirements of the UDLM.

Perform the following steps as superuser on each cluster node.

1. On each node, create an entry for the database administrator group in the /etc/group file and add potential users to the group.

   This group normally is named dba. Verify that root and oracle are members of the dba group and add entries as necessary for other DBA users. Verify that the group IDs are the same on all the nodes that run Sun Cluster HA for Oracle Parallel Server. For example:

   dba:*:520:root,oracle

   You can make the name service entries in a network name service (for example, NIS or NIS+) so that the information is available to Sun Cluster HA for Oracle Parallel Server clients. You can also make entries in the local /etc files to eliminate dependency on the network name service.

2. On each node, create an entry for the Oracle user ID (the group and password) in the /etc/passwd file and run the pwconv(1M) command to create an entry in the /etc/shadow file.

   This Oracle user ID is normally oracle. For example:

   # useradd -u 120 -g dba -d /orahome oracle

   Ensure that the user IDs are the same on all the nodes that run Sun Cluster HA for Oracle Parallel Server.

Where to Go from Here

After setting up the cluster environment for OPS, install the UDLM software on each cluster node. For instructions, see your OPS installation documentation.