DL/I and CA IDMS/DB › Physical Access Methods › HSAM Access

HSAM Access

What HSAM Provides

The HSAM access method provides sequential access to root segments and child segments. The top-to-bottom, left-to-right hierarchical sequence is reflected in the physical contiguity of the database records.

Use HSAM for Sequential File Processing

The HSAM organization requires fixed-length records and is intended exclusively for conventional sequential file processing. There is no provision for making updates in place, without copying the database. Also, HSAM supports only hierarchical relationships, not logical relationships.

For more information about HSAM access method, see DL/I Access Methods in CA IDMS/DB.