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LISTCAT ALL Output Listing for a Non-VSAM Tailored Compressed Data Set z/OS DFSMS Access Method Services Commands SC23-6846-01 |
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The following example illustrates the output produced for a non-VSAM tailored compressed data set. Tailored compression (used only with non-VSAM compressed data sets) creates dictionaries tailored specifically to the initial data written to the data set. Once derived, the dictionary is stored within the data set. This technique improves compression ratios over generic DBB compression. Note: The following information is not an intended programming interface.
It is provided for diagnostic purposes only.
The first byte of the dictionary token indicates the type of compression
used for the data set.
Figure 1. Example
of LISTCAT ALL Output for a Non-VSAM Tailored Compressed Dataset
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Copyright IBM Corporation 1990, 2014
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