/GRANULARITY=n

    This qualifier specifies the number of key-associated areas in
    an indexed file. A file can contain from 1 to 255 key-associated
    areas and each area can contain one or more index levels from one
    or more keys.

    Each key definition contains the following area designations:

    o  DATA_AREA

    o  LEVEL1_INDEX_AREA

    o  INDEX_AREA

    During input processing, the optimization and redesign functions
    assign two areas per key, one for data and one for both indexes.
    During output processing, the area designators are adjusted
    according to the granularity specified. Checks are made to
    exclude areas that have no key indexes and to create new key
    indexed areas where none previously existed.

    To assign more than two areas per key (DOUBLE) or to assign
    nonstandard key and area associations, you must invoke an
    interactive session. With the granularity qualifier configured
    as GRANULARITY=DOUBLE, create new areas and set the corresponding
    area designators to reference the new areas on a per-key basis.

    Example

  $ EDIT/FDL/GRANULARITY=2 TEMP_DATA.FDL

    This command begins an interactive session in which the output
    granularity will be two (2). TEMP_DATA.FDL is the name of the FDL
    file being processed.