z/OS MVS JCL Reference
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Sequential concatenation

z/OS MVS JCL Reference
SA23-1385-00

There are two types of sequential concatenation:
  • Like. The same logical record length (LRECL) value and record format apply to all the data sets. The block size (BLKSIZE) values and device characteristics might differ.
  • Unlike. Any of data set characteristics might differ. The application program must have logic to support this capability.

The DD statements are for any combination of sequential disk or tape data sets, members of PDSs and PDSEs, spooled input stream ("sysin") data sets, z/OS® UNIX files, a TSO terminal (TERM=TS) and unit record (such as virtual card reader) devices. The application program uses BSAM, QSAM or EXCP to read.

Parent topic: Two types of concatenation

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