The reserve clause allows the user to specify the number of input/output buffers to be allocated at run-time for the files. If the RESER...
The reserve clause allows the user to specify the
number of input/output buffers to be allocated at
run-time for the files.
If the RESERVE clause is omitted, the number
of buffers at run time is taken from the DD
statement when running under MVS, or from the TLBL JCL
statement when running under VSE.
If none is specified, the system default is taken.
If the file connector referenced by file-name-1
in the SELECT clause is an external file connector,
all file control entries in the run unit that reference
this file connector must have the same value for the
integer specified in the RESERVE clause.
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