Answer Posted / prabudha jain

The GDG syntax is
//SYSIN DD *
DEFINE GDG(NAME (MYLIB.LIB.TEST) -
LIMIT (10) -
NOEMPTY -
SCRATCH)
/*
LIMIT -This parameter is used to specify the total number
of generations that the GDG may contain.

EMPTY -Specifies tht all existing generations of the GDG
are to be uncataloged whenever the generations of GDG
reached the maximum limit.

NOEMPTY -Specifies that only the oldest generation of the
GDG is to be uncataloged if the limit is reached.

SCRATCH -Specifies that whenever entry of the GDG is
removed from the index, it should be deleted physically and
uncataloged.

NOSCRATCH-Specifies that whenever entry of the GDG is
removed from the index, it should not be physically deleted
and uncataloged.

Note:SCRATCH and NOEMPTY are the default parameters.

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