The GLVSHAREDTASK parameter controls the availability and features of the VSAM shared file support task. This task is attached at product initialization. Both the OPSHFI POI command and OPS/REXX function queue shared file requests to this task and, optionally, wait for a result. If the shared file task is not used, you can save a considerable amount of virtual storage overhead by not starting this task or by prohibiting the execution of GLV AOF rules by the READ function of the OPSHFI command.
GLVRULES
The shared file task is attached, and it can execute GLV rules. GLVRULES requires a large amount of virtual storage, more than any other value.
The shared file task is not attached. Any OPSHFI command that is issued produces a return code of 8. NOTASK eliminates the overhead associated with unwanted features.
The shared file is attached, but it cannot invoke GLV rules. The system ignores any SVRULES(YES) keyword specified for the OPSHFI command. NOGLVRULES prevents allocating all the OPS/REXX virtual storage that the execution of GLV rules requires.
At initialization
Example: GLVSHAREDTASK
This function specifies that the OPSHFI command should not be used by this copy of the product.
OPSPRM('SET','GLVSHAREDTASK','NOTASK')
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