Default buffer handler for ESDS, OSAM, and OSAM LDS
In IMS High Performance Unload, the default buffer handler for ESDS, OSAM, and OSAM LDS is CAB, whereas in DBT V2 HSSR the default is BB.
If your JCL for DBT V2 HSSR does not specify HSSRCABP control statements to use CAB, running the job on IMS High Performance Unload will require more storage.
To avoid the storage problem, the function to change the default buffer handler is provided. For details, see Site default options.