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VSAM Managed SAM Naming Conventions

Use the following format to name a VSAM managed SAM file:

file-id,M,prim#recs, sec#recs,catalog-id

The following list describes the parts of a VSAM managed SAM file name:

file-id

The name that identifies this data set, which is implicitly defined to VSAM at open time.

Range: 1 to 44 characters.

M

Indicates that this is a VSAM managed SAM file.

Note: If you enter a transfer request from a platform that has not yet implemented the extended tape processing parameters or menu interface fields for controlling tape processing to a CA XCOM Data Transport z/VSE server, you must use the T option. You are restricted to standard label tape processing.

prim#recs

Used for output files only. This indicates the number of blocks (of the size defined by the BLKSIZE parameter) for the primary data set allocation.

sec#recs

Used for output files only. This indicates the number of blocks for the secondary data set allocation. If no secondary allocation is coded, VSAM defaults to 20% of the primary allocation. Zero can be specified if you do not want any secondary allocation.

catalog-id

Optional for output files.

Defines the name of the user catalog that will own the data set. You can leave this field blank if the master catalog owns the data set.

Note: The use of VSAM managed SAM files requires IBM's IDCAMS program to be dynamically loaded in the partition. This requires an additional 130 KB partition GETVIS storage.