SAS(R) 9.1.3 Companion for z/OS

Statements under z/OS FILENAME Statement 375
SPACE=(unit,(primary,secondary,directory),
RLSE,type,ROUND)
is the amount of disk space to be provided for a data set that is being created.
unit
can be any of the following:
TRK allocates the space in tracks.
CYL allocates the space in cylinders.
blklen allocates space in blocks whose block length is blklen
bytes. The system computes how many tracks are
allocated.
primary
specifies how many tracks, cylinders, or blocks to allocate.
secondary
specifies how many additional tracks, cylinders, or blocks to allocate if more
space is needed. The system does not allocate additional space until it is
needed.
directory
specifies how many 256-byte directory blocks are needed for the directory of a
partitioned data set.
RLSE
causes unused space that was allocated to an output data set to be released
when the data set is closed. Unused space is released only if the data set is
opened for output and if the last operation was a write operation.
type
can be any of the following:
CONTIG specifies to use contiguous space.
MXIG specifies to use the maximum contiguous space.
ALX specifies to use different areas of contiguous space.
Note: You can also specify MXIG or ALX as a separate, individual
keyword on the FILENAME statement rather than as a subparameter of the
SPACE= option. R
ROUND
specifies that the allocated space must be equal to an integral number of
cylinders when the specified unit was a block length. If unit was specified as
TRK or CYL, the system ignores ROUND.
Here are some examples of the SPACE parameter:
SPACE=(CYL,10)
or SPACE=(CYL,(10,,10),,CONTIG)
SPACE=(1024,(100,50,20),RLSE,MXIG,ROUND)
If you do not specify SPACE, its values are taken from the SAS system options
FILEUNIT=, FILESPPRI=, FILESPSEC=, and FILEDIRBLK=, in the following
form:
SPACE=(FILEUNIT,(FILESPPRI, FILESPSEC,FILEDIRBLK))
The default specification is SPACE=(CYL,(1,1,6)) for partitioned data sets and
SPACE=(CYL,(1,1)) for sequential data sets.
See MVS JCL Reference by IBM for complete information about how to use the
SPACE= option.