JES Spool Data Set Browse

Spool data set browse (SDSB) is a function application program that can be invoked to process spool data sets. JES provides an interface that application programs can use for this purpose. SDSB can be used to access data sets that are still open in running address spaces. Any full data buffers that have been written to SPOOL can be read and optionally, data that has not been written (unwritten buffer support) can also be accessed.

Note: To read unwritten buffers with JES3, each of the following systems must be at z/OS® V1R11, or higher:

The system of the application.
The system of the global processor.
The system where the target data set is open.

If the application is running on the same system where the target data set is open, the system must be at z/OS V1R10, or higher.

Programs can use SDSB to allocate SPOOL data sets. The data set being requested is specified by passing the JES data set name along with a SPOOL browse token to MVS™ dynamic allocation. When the data set is allocated, the data set can be read using one of two methods:

Using the compatibility interface (DCB, GET).
Using the ACB/RPL interface.

You use the compatibility interface when synchronous sequential access is required. You use the ACB/RPL interface when random access to the spool file is required, or when asynchronous processing is required.