Installation guide

There are two ways to upgrade a cluster subsystem:

Procedure

● Perform a major upgrade, which involves cluster downtime, then shut down and restart all servers. You must:

a) Run sp_companion suspend, as described in Using Sybase Failover in a High Availability System.

b) Take offline the resource groups of primary and secondary companions on both nodes. Ensure that the

companion server and corresponding resource groups are not automatically brought online until the

cluster system upgrade is complete.

c) Upgrade the cluster subsystem following the instructions from the cluster system vendor. You may find

options to migrate the current resource groups to the new cluster version. If such an option is not

available (or if the resource groups get deleted or corrupted), re-create the resource groups and

configure them appropriately after you have upgraded the cluster system.

d) Bring the resource groups online. This should bring primary and secondary companions online on their

respective nodes.

e) Run sp_companion resume as described in Using Sybase Failover in a High Availability System.

● To avoid cluster downtime, perform a minor upgrade. Nodes are failed over to other nodes and upgraded one

at a time. For example, assuming ASE1 is the primary companion on node N1, and ASE2 is secondary

companion running on node N2:

a) Upgrade the primary companion:

1. Relocate the primary resource group to N2 or shut down ASE1. This causes ASE1 to fail over from N1

to N2.

2. Upgrade the cluster subsystem on N1 following the upgrade instructions provided by the vendor.

3. Fail back ASE1 from N2 to N1. See the appropriate cluster chapter in Using Sybase Failover in a High

Availability System for more details on SAP ASE failback.

b) Upgrade the secondary companion. If you are using a symmetric configuration, follow the steps in

"upgrade the primary companion," above, for ASE2.

If you are using an asymmetric configuration:

1. Take the secondary resource group offline and verify that ASE2 is shut down. ASE2 is unavailable

during this upgrade.

2. Upgrade the cluster subsystem on N2 following the upgrade instructions from the vendor.

3. Start ASE2 by bringing the secondary resource group online to N2.

Installation Guide for Linux

SAP ASE Upgrades