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The Exclusion feature lets you specify jobs, programs, and modules to be excluded from compression or expansion processing. This feature prevents backup/restore products from double compressing or unnecessarily expanding data. Ideal examples are the backup and restore functions of CA Disk or the IBM program DFDSS. You can also use the Exclusion feature to force programs performing Control Interval (CI) access or EXCP processing, such as SYNCSORT, to process transparent data sets using record management access, since
CA Compress does not expand or compress data when invoked by a program performing CI or EXCP processing.
When specifying DCB parameters for compressed PS data sets being processed with the exclusion feature, be sure to specify the compressed attributes, since you are processing compressed data sets without CA Compress. Likewise, SORT control statements must be based on the compressed record descriptions.
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