Migration Guidelines

Observe the following guidelines when you migrate to Dynamic Server 10.0:

• Check the release notes for information about the correct operating-system release and any patches that you need for successful installation and operation of the database server.

  The release notes are in one of the following directories:

  • The Informix folder on Windows

    To display the release notes, choose Start > Programs > Informix Dynamic Server 10.0 > Release Notes from the taskbar.

  • $INFORMIXDIR/release/en_us/0333 on UNIX or Linux
• On UNIX or Linux, retain both versions of the IBM Informix product software on disk, if you have enough disk resources. You cannot retain both versions of the IBM Informix product software on disk on Windows.
• Retain the installation media from both versions of the IBM Informix product software.
• Before you convert to the target database server from the source database server, make sure that no open transactions exist in the source database server.

  Fast recovery will fail when rolling back open transactions during the conversion. For information about how to close the source database server properly prior to conversion, see Close All Transactions and Shut Down the Source Database Server.

• Important: Before migration, you must perform a level-0 backup of all storage spaces with the source database server. After you complete the migration, perform another level-0 backup with Dynamic Server 10.0.

  You need to make a backup with each database server because you can restore a backup only with the same version of the database server on which you did the backup.

• It is recommended that you use a test instance of your database server to test the new version of the database server.
• Verify storage-manager validation for the target database server.

  For details, see Storage-Manager Validation and Installation.

• After you migrate and start using Version 10.0 consider the reversion issues described in Reverting from Dynamic Server 10.0, in case you need to revert. For example, any new in-place alter that you perform in using Version 10.0 must be completed before you revert.

For additional installation information and guidelines, refer to your IBM Informix: Installation Guide and your IBM Informix: Getting Started Guide.