Encrypting full-function OSAM database linear data sets (HALDB, OLR-capable)

Use HALDB Online Reorganization (OLR) to reorganize unencrypted OSAM sequential data sets in OLR-capable HALDBs into unencrypted VSAM linear data sets. Converting to VSAM linear data sets is required if you want to use z/OS encryption.

To reorganize unencrypted OSAM data sets into unencrypted VSAM LDSs:

Procedure

  1. Preallocate the new OLR target database data sets as VSAM linear data sets: 
    DEFINE CLUSTER NAME(my.osam.dataset) LINEAR DATACLAS(dclasname)....
    • If the output data sets are not preallocated as LDSs, OLR will create target data sets based on the attributes of the source data sets.
    • Minimum LDS CI size is 4096. Check the DBD randomization parameters for HDAM or PHDAM and ensure rbn times CI size does not exceed 4 GB for OLR-capable HALDBs or 8 GB for either non-HALDBs or non-OLR-capable HALDBs.
  2. Run IMS online reorganization for one or more partitions.
  3. Repeat until all partitions of the HALDB are reorganized.
  4. Preallocate the output data sets to use a key label. See Data set encryption support for IMS for more information.