The upgrade process depends on the version of Sybase IQ currently installed on your system.
Choose an appropriate installation directory. You cannot install Sybase IQ in the same parent directory as an earlier version. Uninstall the version currently installed on your system, or install Sybase IQ in a different parent directory.
Upgrade your client tools. Although you can use the current version of the client tools to connect to an earlier 15.x server, some options, tools, and objects may not be available.
Upgrade Sybase IQ, if necessary. All database migration paths assume that you are migrating from Sybase IQ 12.6 ESD #11 or Sybase 12.7 ESD #5. If you are migrating from a version earlier than 12.6, you must upgrade your software before you migrate your database.
Review the migration procedures and plan your migration. Sybase provides utilities that you can use to migrate your 12.x data to Sybase IQ 15.3. Understanding how these utilities work can help you plan your migration more effectively.
Follow the work flows for the type of databases you want to migrate. There are separate migration paths for simplex and multiplex databases.