Install guide

<fence>

</m ethod>

</fence>

</clusternode>

<fence>

</m ethod>

</fence>

</clusternode>

While most customers do not bond this interface, it is supported by Oracle.

4.3. GFS Configuration

GFS file systems are certified for use with specific versions of Oracle RAC. For Oracle customers, see

the Oracle Support Document 329530.1 for all currently certified combinations.

Clustered GFS requires that the Distributed Lock Manager (DLM) and the Clustered LVM services be

configured and started. T he DLM, if present will be started by CMAN. The RPM group should have

installed all relevant components.

CLVMD only requires 1 change to the /etc/lvm/lvm .conf file; you must set locking_type to 3:

# Type of locking to use. Defaults to local file-based locking (1).

# Turn locking off by setting to 0 (dangerous: risks metadata corruption

# if LVM2 commands get run concurrently).

# Type 2 uses the external shared library locking_library.

# Type 3 uses built-in clustered locking.

locking_type = 3

Tip

The GFS service will not start up if the fenced service has not started.

Tip

Host-based mirroring (or more importantly host-based RAID) is not recommended for use with

RAC (especially mission critical databases). RAC requires a storage array and any storage array

worthy of running an Oracle RAC cluster will have superior RAID and RAIDSET management

capabilities. Concatenating volumes does not involve RAID management, so that is less bug

prone than using multiple layers of RAID.

Red Hat Enterprise Linux 5 Configuration Example - Oracle HA on Cluster Suite