Installation manual

Preparing to Upgrade in an OpenVMS Cluster Environment
6.4 Concurrent Upgrade
6.4 Concurrent Upgrade
This section describes the following:
• How a concurrent upgrade works
• Tasks you need to perform to prepare your system for a concurrent upgrade
6.4.1 How a Concurrent Upgrade Works
During a concurrent upgrade, you must shut down the entire cluster and upgrade
each system disk and reboot each VAX computer in the cluster. When the
cluster reboots, each VAX computer will be running the upgraded version of the
OpenVMS VAX operating system.
6.4.2 Preparing for a Concurrent Upgrade
To prepare for a concurrent upgrade, use the following procedure:
1. Shut down the entire cluster by logging in to the SYSTEM account on each
node locally, entering the following command, and choosing the CLUSTER_
SHUTDOWN option:
$ @SYS$SYSTEM:SHUTDOWN
2. If you have only one system disk for your cluster, go to step 3.
If you have more than one system disk, select one to upgrade.
Caution
You cannot use the system disk that you usually use as the quorum disk
to hold the save sets from the distribution kit.
3. Perform a conversational boot of a single VAX computer from the system disk
you will be upgrading. For more information about the conversational boot
procedure, refer to the upgrade and installation supplement for your VAX
computer.
At the SYSBOOT> prompt, use the SHOW VOTES and SHOW EXPECTED_
VOTES command to display the current values of the parameters. Write
these values down because you will need to restore them later. Set the
VOTES and EXPECTED_VOTES values to 1 by entering the following
commands:
SYSBOOT> USE CURRENT
SYSBOOT> SET VOTES 1
SYSBOOT> SET EXPECTED_VOTES 1
SYSBOOT> CONTINUE
4. Upgrade the system disk, using the procedure in Chapter 7.
5. If you have only one system disk, go to step 6.
If you have more than one system disk, shut down the system that you just
upgraded. Then repeat steps 2 through 4 to upgrade each system disk in the
cluster. When you finish upgrading all of the system disks, go to step 6.
6. Reboot each computer in the cluster environment.
7. Complete the postupgrade procedures described in Chapter 8.
Preparing to Upgrade in an OpenVMS Cluster Environment 6–3