LINK DOSUSER1 331 331 R rpass
LINKDOSUSER1 231 231 R rpass
When the VSE System Must Be Online
Performance
Most of what you do in theCMS/DOS environment for VSE program develop
ment requires that the VSE system pack and/or the VSE private libraries be avail
able toCMS/DOS. In general, you need these VSE volumes whenever: You use the DOS/VS COBOL compiler or DOS/PLI Optimizing compiler.
The compilers are executed from the system or private core image libraries.Your source programs contain COPY, LIBRARY, %INCLUDE, or CBL
statements. These statements copy books from your system or the private
source statement library.You invoke one of the library programs: DSERV, RSERV, SSERV, PSERV,
or ESERV.You execute VSE programs that use LIOCS modules. CMS/DOS fetches most
of theLIOCS routines for non-disk files directly from VSE system or private
libraries.
A VSE system pack is usable when it is:
Defined for your virtual machine
Accessed
Specified, by mode letter, on the SETDOS ON command.
A VSE private library is usable when it is:
Defined for your virtual machine
Accessed
Identified via ASSGN and DLBL commands.
Although you can use theCMS/DOS library services to place the DOS/VS COBOL compiler, DOS PL/I compiler, and ESERV program in a CMS DOSLIB, it is recommended that you do not use this method with 800-byte format CMS
disks.CMS/DOS can fetch these directly from the VSE system or private libraries
faster than from aDOSLIB on 800-byte format CMS disks. Fetch time from DOSLIBs on 512, 1K-, 2K-, or 4K-byte format CMS disks is approximately equiv
alent to that of VSE system or private libraries.
Execution Considerations and Restrictions
TheCMS/DOS environment does not support the execution of VSE programs that
use:• Teleprocessing or indexed sequential (ISAM) access methods. CMS/DOS supports only the sequential (SAM) and virtual storage (VSAM) access meth
ods.
Multitasking.CMS/DOS supports only a single partition, the background par
tition.VSE Support Under eMS 413
LINK
When the VSE System Must Be Online
Performance
Most of what you do in the
ment requires that the VSE system pack and/or the VSE private libraries be avail
able to
The compilers are executed from the system or private core image libraries.
statements. These statements copy books from your system or the private
source statement library.
or ESERV.
of the
libraries.
A VSE system pack is usable when it is:
Defined for your virtual machine
Accessed
Specified, by mode letter, on the SET
A VSE private library is usable when it is:
Defined for your virtual machine
Accessed
Identified via ASSGN and DLBL commands.
Although you can use the
disks.
faster than from a
alent to that of VSE system or private libraries.
Execution Considerations and Restrictions
The
use:
ods.
Multitasking.
tition.