Keep the CA WA CA 7 Edition files reorganized, sized, and placed correctly.
The size and location of CA WA CA 7 Edition files have an impact on the performance of the product. CA WA CA 7 Edition files can benefit from the fiber attachment, DASD Fast Write and the caching attribute on storage devices. Do not place CA WA CA 7 Edition files on the DASD volumes with other high activity product files.
The browse data set usually has a ddname in CA7ONL of BROWSE and is a sequential file that contains messages that CA7ONL produces. The messages are buffered according to the block size before they are written to the file. You can use a larger block size to decrease the number of writes to the file, which can improve the overall performance. If you have periods of inactivity in CA7ONL, the browse messages are not always written in a timely manner because the buffer must fill before the writing. To force the writing of the block to the browse file, log in to CA7ONL. Issue the /MSG,LT=MASTER,M=message enough times to fill the buffer. If you had a buffer size of 800, you would have to issue this 10 times to write the block to the browse file. Because typically CA7ONL is continuously busy, this activity is not an issue.
The communications data set, which has a ddname of UCC7CMDS, is the focal point of communication between CA7ONL and ICOM. The tracking information that the system collects is sent to CA7ONL by ICOM through the communications data set. The XCF option is available to pass SMF data from system to system instead of writing to the communications data set. This option can alleviate the major source of contention. Any trailer or U7SVC commands are also fed to CA7ONL through this file. In multi-CPU environments, it is imperative for performance that this file is on a low accessed volume. This file is the only CA WA CA 7 Edition file that has explicit reserves done on it for synchronization.
Business Value:
The correct placement, use, and definition of CA WA CA 7 Edition files promote better performance of CA7ONL.
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