HALDB Partition Selection exit routines

Any installation-defined High Availability Large Database (HALDB) Partition Selection exit routines must be assembled and bound into a load library.

The library you choose needs to be part of the IMS SDFSRESL concatenation. Also, all HALDB Partition Selection exit routines must be linked as re-entrant.

You can specify the name of the HALDB Partition Selection exit routine during DBD generation, with the HALDB Partition Definition utility, or on the DBRC INIT.DB command.

If a HALDB Partition Selection exit routine is defined, you must also consider the Partition String Value parameter defined by the HALDB Partitioned Definition utility or the KEYSTRNG parameter on the DBRC INIT.PART command. This parameter provides the user exit routine with optional data that can be used for HALDB partition selection. The parameter is not required and may be omitted.