Anchor point area
The anchor point area is made up of one or more 4-byte root anchor points (RAPs).
Each RAP contains the address of a root segment. For HDAM, you
specify the number of RAPs you need on the RMNAME parameter in the
DBD statement. For PHDAM, you specify the number of RAPs you need
on the RMNAME parameter in the DBD statement, or by using the HALDB
Partition Definition utility, or on the DBRC INIT.PART command.
For HIDAM (but not PHIDAM), you specify whether RAPs exist by specifying
PTR=T or PTR=H for a root segment type. Only one RAP per block or
CI is generated. How RAPs are used in HDAM, PHDAM, and HIDAM differs.
An anchor point area in an HDAM or PHDAM database is shown in the following figure.
