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Releasing Unused Space from a DASD Data Set Using PARTREL z/OS DFSMSdfp Advanced Services SC23-6861-01 |
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DADSM supports the release of unused space that is allocated to
sequential or partitioned data sets, PDSEs, sequential extended-format
data sets, and VSAM extended format data sets.The partial
release function is called when:
For an extended address volume, partial release processing will release space on multicylinder unit boundaries when the last used track is in an extent in cylinder-managed space. For VSAM striped data sets where at least one stripe is on an extended address volume, partial release processing will ensure the stripes remain the same size. For these reasons, it is possible that the high allocated track after the release may be larger than the last used track or that no space could be released. |
Copyright IBM Corporation 1990, 2014
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