You must execute this command in Single User. MUF must not be enabled. With Simplify mode, this is enforced by several protections. Simplify protections include ensuring that the CXX has not been opened by a previous function without the protections. The INIT CXX function must be the first function in an execution that requires the CXX. Because the INIT CXX is required to run Single User, it establishes Single User protections for all later functions in the same execution.
Execute the INIT function with the following command format:
►►─ INIT AREA=CXX,CXXNAME=aaaaaaaa,DATACOM= ─┬─ AD ─┬──┬──────────────┬►◄ └─ DB ─┘ └─ ,VOLUMES=n ─┘
Command
Invokes the function to format areas for CA Datacom/DB use.
Required Keywords
Identifies the area to be formatted as the Directory.
Assigns an internal name to the new Directory to be created.
The name can be a single asterisk (*) to request the name be taken from the DBSIDPR module. With Simplify mode, we strongly recommend this, but if not an asterisk the names are compared and the function fails if they mismatch.
It is a ‘best practice’ to have the CXXNAME be 1-7 characters to allow for it to also be used as the MUFPLEX name and the MUF name be the same with a suffix of, for example, 1 or 2, or A or B.
A 1- to 8-character name
(No default)
Identifies the new Directory as a CA Datacom/DB Directory or a CA Datacom/AD Directory.
Note: CA Datacom TR sites should specify AD.
AD or DB
(No default)
Optional Keyword
(z/OS only)The n in VOLUMES=n is the maximum number of volumes to initialize. Without the VOLUMES= option, the number of volumes having specific VOLSER information is initialized. The VOLUMES= option allows more volumes to be catalogued as part of the data set and available to a dynamic EXTEND of the CXX while being effectively held in reserve without a specific allocation.
For example, you could specify VOLUMES=3 when using an INIT to initialize an area that needs 3 volumes, intending to only initialize the space on 3 volumes. But the JCL could specify 6 specific volumes, for example:
VOL=SER=(VOL001,VOL002,VOL003,VOL004,VOL005,VOL006)
In this example, volumes 4/5/6 are not allocated or used during the INIT but are available to a dynamic extend. In this case, the extra volumes would not need to be removed before another INIT.
the number n of volumes to be catalogued
(No Default)
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