Technical Notes

MVS South

The following Technical Notes apply to the NIH Computer Center and the software and hardware available via MVS on the IBM 370 systems at NIH and may not necessarily reflect similar implementations at other installations. For additional technical details or clarification, consult the NIH Computer Center User's Guide, or contact TASC. Information presented in this publication supersedes all documentation with earlier publication dates. To contact any of the groups mentioned in these articles, please refer to the telephone listing at the back of this Interface.

In preparation for our future migration to the OS/390 operating system on the MVS South system, the Language Environment run-time library SYS1.SCEERUN will be added to the system LINKLIST on the July 12, 1998. This system change has been tested and should be transparent to users.

This run-time library contains modules for the programming languages COBOL, PL1, C/C++ and FORTRAN. In the past this library has been accessed through a STEPLIB. By placing these modules in the LINKLIST, they are already in memory when user's jobs request them—providing a performance enhancement over STEPLIB.

The NIH Computer Center procedures will be modified on Monday, July 13, to reflect this change. If you do not use the NIH procedures and currently have any STEPLIBs in your JCL pointing to SYS1.SCEERUN, you should remove them on or after July 13 to take advantage of the performance improvements.

At this time also, the library SYS1.SIBMLINK—which is a run-time library for the old OS/VS version 2.3 PL1—will be removed from the LINKLIST.

If you notice any problem, please contact TASC so that we can work with you to resolve it.