Changes you can apply to a single partition

Certain characteristics of HALDB databases are specific to each partition in the database. To change these characteristics, you do not need to take the entire HALDB database offline; you need to take offline only the partition in which you are making changes.

Before making changes to a partition, issue either the type-1 command /DBRECOVERY DB partition_name or the type-2 command UPDATE DB NAME(partition_name) STOP(ACCESS) against the partition.

For example, you can change the following characteristics of a HALDB partition by taking only the single partition offline:
  • Data set name prefix
  • Randomizing module name
  • Number of root anchor points (RAPs)
  • Bytes parameter
  • OSAM block size
  • VSAM CI size
Note: In addition to taking the partition offline, the changes listed above require you to unload the partition, make the applicable change, reload the partition, and then restore access to the partition.