38 Informix Dynamic Server 11: Advanced Functionality for Modern Business
2.1 How to get to IDS 11
IDS 11 is the path forward for all previous versions of the Informix Dynamic
Server. Many installations of IDS 11 will be upgrades to earlier versions of IDS,
other versions of Informix database servers, or even other database servers. It
makes sense then to talk about migration and upgrade paths first.
2.1.1 In-place upgrades
One of the wonderful things about administering Informix database servers is
that there is always a graceful way to move from one version to another. In most
cases, the upgrade occurs in place with the old instance shut down, the new
binaries loaded, and the instance restarted. The upgrade is complete. The
unspoken assumption is that installation and testing occurred first on a test or
development server.
Depending on the current version of the database server, moving to IDS 11 can
occur through an in-place upgrade. Other versions or even other Informix servers
require an interim step. The paths to IDS 11 are:
򐂰 IDS 7.31, 9.21, 9.30, 9.40, or 10.00: It is a direct upgrade. You can install IDS
11, then shut down the instance, reset the environment to point to the IDS 11
software, and restart the instance. IDS 11 recognizes the older data and
adjusts things as necessary.
򐂰 IDS 7.30 or 7.24 without Enterprise Replication: You must move to either IDS
9.40 or 10.00 before moving to IDS 11. Between these earlier versions and
more current versions, a large number of structural changes occurred, not all
of which are visible to an administrator. Make these changes to instance and
database structures prior to moving to IDS 11.
򐂰 IDS 7.24 with replication: You must move to IDS 7.31 first.
򐂰 IDS 9.14 or 9.20: You must move to IDS 9.21 or 9.30 before moving to IDS
11.
򐂰 XPS 8.x except 8.21U: You must move to IDS 7.24 before moving to IDS 11.
򐂰 XPS 8.21U: You must move to IDS 7.24 without replication before moving to
IDS 11.
򐂰 OnLine 5.x: You must move to IDS 7.31 first.
Important: That assumption is extremely important. Never install any
software upgrade into production without first testing the process and
application thoroughly.

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