To preallocate and deallocate a data set, use the PREALLOC command.
Type
OPER command
Authority
To issue the PREALLOC command, you require OPER authority.
This command has the following format:
PREALLOC [dataset]
[ALLOC|UNALLOC]
Indicates the data set name.
Requests that the data set be allocated. ALLOC is the default.
Requests that the data set be unallocated.
When access to the data set is needed, z/OS Agent bypasses the dynamic allocation for each preallocated data set.
Use one PREALLOC command for each data set you wish to preallocate.
You can issue the PREALLOC command without any operands to display the current preallocation list of data sets. Issue the PREALLOC command with the UNALLOC operand to de-allocate a previously allocated data set.
Related information
For information on defining z/OS Agent data sets, see the Installation and Configuration Guide.
Example: Display the Current Preallocation List
This example shows how to display the current preallocation list of data sets.
OPER PREALLOC
Example: Preallocate a Data Set
This example shows how to preallocate data set CYBER.JCL.CNTL.
OPER PREALLOC CYBER.JCL.CNTL ALLOC
Example: Unallocate a Data Set
This example shows how to unallocate data set CYBER.ZAG.PROCS.
OPER PREALLOC CYBER.ZAG.PROCS UNALLOC
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