Changing the name of a HALDB partition

You can change the name of HALDB partition by deleting the partition and redefining it with a new name.

However, deleting and redefining a partition has a number of consequences that you should be aware of:

  • The partition ID number changes.
  • The image copy records for the partition are deleted from the RECON data sets.
  • The ALLOC records for the partition are deleted from the RECON data sets.
Note: Using the online change function, a HALDB partition name that has been deleted from the RECON data set cannot be reused by the online change function to name a database without also performing a cold start of IMS. The opposite is also true: a database name that has been deleted from IMS cannot be reused to name a HALDB partition without also performing a cold start.

To change the name of a HALDB partition:

  • Take the partition offline by issuing either the /DBRECOVERY DB partition_name command or the UPDATE DB NAME(partition_name) STOP(ACCESS) command.
  • Unload the partition.
  • Delete the partition definition from the RECON data set.
  • Redefine the partition in the RECON data set with the new name.
  • Initialize the partition.
  • Reload the partition.

  • Make the partition available by issuing the /START DB partition_name command or the UPDATE DB NAME(partition_name) START(ACCESS) command.

After you complete the name change process, when IMS rebuilds the online partition structures for the HALDB database it issues message DFS0415W with reason code 90 for the deleted partition.