Veritas Storage Foundation 5.1 SP1 for Oracle RAC Administrator"s Guide (5900-1512, April 2011)

The vxfenswap utility rolls back the migration operation.

■ If you want to commit the new fencing configuration changes, answer y

at the prompt.

Do you wish to commit this change? [y/n] (default: n) y

If the utility successfully commits, the utility moves the

/etc/vxfenmode.test file to the /etc/vxfenmode file.

After the migration is complete, verify the change in the fencing mode.

# vxfenadm -d

For example, after the migration from disk-based fencing to server-based

fencing in the SF Oracle RAC cluster:

I/O Fencing Cluster Information:

================================

Fencing Protocol Version: 201

Fencing Mode: Customized

Fencing Mechanism: cps

Cluster Members:

* 0 (galaxy)

1 (nebula)

RFSM State Information:

node 0 in state 8 (running)

node 1 in state 8 (running)

Verify the current coordination points that the vxfen driver uses.

# vxfenconfig -l

Migrating from server-based to disk-based fencing in an online cluster

You can migrate between disk-based fencing and server-based fencing without

incurring application downtime in the SF Oracle RAC clusters.

You can migrate from server-based fencing to disk-based fencing when you want

to perform maintenance tasks on the CP server systems.

Similarly, you can migrate from disk-based fencing to server-based fencing in the

following cases:

■ You want to leverage the benefits of server-based fencing.

■ You want to replace faulty coordinator disks with CP servers.

63Overview of Veritas Storage Foundation for Oracle RAC

About preventing data corruption with I/O fencing