Determining order of upgrading a cluster

There are several factors that determine the order in which sites, databases, or both must be upgraded.

About this task

To get the full benefit of Rational® Synergy Release 7.2 or later, all databases in the DCM cluster must be updated before resuming DCM operations and regular usage.

However, when these databases are located at different sites or when many of databases are in the cluster, it might not be practical to upgrade them all at one time. There might be some time when some of the cluster has been upgraded to 7.2 or later and some is at one or more prior releases.

Procedure

To determine the upgrading order:

  1. Hub databases must be updated before the spoke databases that exchange data with them. After a hub database is updated, as each spoke database is upgraded, it can fully use the new facilities in Release 7.2 or later. Conversely, if two Release 7.2 or later databases share data by using a pre-7.2 or later hub database, all three databases are constrained by the reduced capabilities of the hub database.
  2. In Master and Satellite DCM methodology, the master database is where master builds are performed and applications are released. It is preferable to update the master database first, though the satellites must also be upgraded before process rules can be shared.

Feedback