HALDB partition initialization

After you define a partition and allocate its data sets, you must initialize the partition.

The initialization process makes a partition usable, but does not place any database segments in the partition. After the initialization process, a partition is empty.

To initialize HALDB partitions, you can use either the HALDB Partition Data Set Initialization utility (DFSUPNT0) or the Database Prereorganization utility (DFSURPR0).

Partition initialization writes the partition ID number and the initial reorganization number in PHDAM and PHIDAM partitions. The initial reorganization number is set to one, unless HALDB reorganization number verification is enabled, in which case the reorganization number is incremented by one from the existing reorganization number that is stored in the RECON data set.

The partition ID number and the reorganization numbers are written in the first 4 bytes of the first block of the first data set. This first block is called the bitmap block.

For PHDAM partitions, partition initialization writes and deletes a dummy record.

For PHIDAM partitions, partition initialization writes a high key record of all X'FF's in each partition.

For PSINDEX partitions, partition initialization writes and deletes a dummy record, which makes the high-used-RBA non-zero.