HALDB partition data sets and recovery

The recovery of HALDB databases is performed by recovering each partition. You recover the database data sets in each partition the same way you recover the database data sets in a non-HALDB database.

After the database data sets in the partition are recovered, you can then rebuild the primary index, if it exists, and the ILDS. HALDB primary indexes and ILDSs are not backed up or recovered.

To rebuild HALDB primary indexes and ILDSs, use the HALDB Index/ILDS Rebuild utility, which provides options for building the ILDS by using either VSAM update mode or VSAM load mode. VSAM load mode, which includes the free space called for in the VSAM KSDS DD statement that defines the ILDS, can improve the performance of both the current execution of the utility and of subsequent reorganizations and recoveries.