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22.1 General upgrade considerations
When you move from one version of Tivoli Storage Manager to another, you are
not just upgrading the server instance. The whole Tivoli Storage Manager
environment consists of numerous components, such as tape devices, clients,
and storage agents, that might be affected by the server upgrade. Therefore, we
explain various consequences of the server migration to the rest of the
environment and considerations you should take before upgrading the server.
Since the upgrade may involve hardware migration as well, we provide general
techniques on how to migrate from one tape technology to another and what
steps are needed to migrate data between libraries.
We show here a specific instance of upgrading to Tivoli Storage Manager V5.3.2;
however, in general, similar principles apply. Always carefully read any readme
files or flashes related to the version that you are upgrading to, as well as the
Installation Guide manual, for any specific considerations.
22.1.1 Server
Generally, you can upgrade to the Tivoli Storage Manager Server V5.3.x from
any previous version. The amount of time needed to upgrade from V5.2 to 5.3.x
is negligible, and the change in database size is also negligible. Versions older
than V5.2 will take longer to upgrade and may cause an increase in database
size. Essentially, the older the version relative to the new version, the longer the
upgrade process will take. Therefore, in general we recommend trying to stay as
current as possible with product releases.
When upgrading multiple servers participating in library sharing to V5.3.x, the
server acting as library manager must be upgraded first to maintain compatibility
among the servers acting as library clients or storage agents. When upgrading
multiple servers participating in server-to-server communication to V5.3.x, all
servers must be upgraded at the same time.
Database
Before upgrading, perform a full backup of your database and save your Tivoli
Storage Manager executables. If you need to revert to a previous release, you
will have to restore from that database backup.
For AIX, Solaris, Linux, Windows, and HP-UX servers, the Tivoli Storage
Manager database is automatically upgraded during the installation of the Tivoli
Storage Manager V5.3.x server. After this database upgrade, you can no longer
run a previous version of the server with the database, so to revert to a previous
version, you would have to restore the corresponding database.
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IBM Tivoli Storage Manager Implementation Guide
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