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CA SMF Director determines where to place the SMF history files by using the information specified on the JCL statements for the HISTORY1 (primary) and HISTORY2 (alternate) DD names. When the DYNAM option is enabled, it is not necessary to specify the HISTORYn DD statements within the JCL used to invoke this product. The values specified in the PDEVN, ADEVN, or PSTORC and ASTORC keywords are used to determine the storage device for the history files. If the HISTORY1 and/or HISTORY2 DD statement is specified in the JCL with the DYNAM option enabled, the information coded on the JCL will override any values specified with the OPTIONS control statement. For substreams, the DD names are different: the assigned stream code is part of the name. For example, if the assigned stream code for the substream is “SA,” the DD names for the stream when allocated will be HISTSA1 for the primary and HISTSA2 for the alternate.
DYNAM is recommended if the primary or alternate history files will reside on different device types.
If the DYNAM option is to be used on a newly converted SCDS from Release 1.5 of Unicenter CA-JARS SMF Utility, the UPDTX control statement may be used to add a device name to a range of history file index entries on the SCDS. The UPDTX control statement may also be used to change the device type for history file index entries, if it becomes necessary to copy or convert history files from one device type to another while retaining the data set name.
CA SMF Director dynamically allocates the z/OS SMF data sets independently from the DYNAM option specification. If a MANx DD statement is specified, the SMF data sets are not dynamically allocated. This product will dynamically allocate the required SMF history files for extract processing when DYNAM is enabled.
The DYNAMVTS option was designed for data centers that employ virtual tape, but do not want CA SMF Director to perform dynamic allocation of history files. It permits dynamic allocation of the input history files to an EXTRACT or PRINT operation only. This is necessary to avoid problems, such as incorrect mount messages, that can arise at such data centers when NODYNAM is in effect.
Note: The DYNAM option must be specified if CA SMF Director is going to manage SMF data that has been recorded to logstreams.
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