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General considerations z/OS DFSORT Application Programming Guide SC23-6878-00 |
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Variable-length records are processed with a record descriptor word (RDW) in positions 1-4, so the data starts in position 5. Fixed-length records are processed without an RDW, so the data starts in position 1. Control statement positions should be specified accordingly. Your records can be EBCDIC, ASCII, Japanese, and data types you define yourself. To process Japanese data types with DFSORT, you can use the IBM Double Byte Character Set Ordering Support Program (DBCS Ordering), Licensed Program 5665-360, Release 2.0, or you can use locale processing with the appropriate locale. Input and output data sets must be on devices that can be used with QSAM or VSAM. Standard system data management rules apply to all data set processing.
In particular:
The maximum record length DFSORT can handle is subject to the following
limitations:
Note: If AQ format is specified, or CH format is specified
and the CHALT option is in effect, the maximum record length for variable-length
records is 32767 bytes, less the length of the control fields.
The number of records that can be sorted using a given amount of
storage is reduced by:
Providing an Extended Function Support program with an EFS01 routine can limit the record length that can be used when processing variable-length records. The minimum block length for tape work data sets is 18 bytes; the minimum record length is 14 bytes. |
Copyright IBM Corporation 1990, 2014
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