IBM z/OS - Manual (Page 67)

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Network Authentication Service
• Network Authentication Service provides authentica-
tion, delegation and data confi dentiality services which
are interoperable with other industry implementations
based on the MIT Kerberos V5 reference implementa-
tion. Network Authentication Service, administered with
RACF commands, supports both the native Kerberos
API functions as well as the GSS-API Kerberos security
mechanism and does not require DCE.
• IPv6 supported by Kerberos with z/OS 1.4 for improved
network security scalability.
• Kerberos in z/OS 1.4 provides an alternative database to
RACF by offering support for its own registry database
using the UNIX System Services NDBM (New Database
Manager) support. NDBM provides full Kerberos admin-
istration support.
Application Enablement Services
z/OS Version 1 Release 6 base elements
Language Environment
Run-Time Library Extensions
z/OS Version 1 Release 6 optional priced features
C/C++ without Debug Tool
DFSORT ™
GDDM ® -PGF V2R1.3
GDDM-REXX V3R2
HLASM Toolkit V1R4
z/OS provides a solid infrastructure on which you can build
new applications, extend existing applications, and run
existing transactional and batch processes.
Language Environment
Language Environment is a base element of z/OS and
provides the run-time environment for programs generated
with C, C++, COBOL, FORTRAN, and PL/1.
C/C++
• Extra Performance Linkage (XPLINK) is provided in z/OS
1.2. A C or C++ application has overhead associated
with each function call. The more highly functionalized a
program, the more overhead. XPLINK helps cut down on
the overhead associated with these function calls and
can improve the performance of these applications. In
order to exploit the bulk of “high-performance linkage”
customers must recompile their C and C++ programs
under the new XPLINK environment. The new IBM SDK
for z/OS Java 2 Technology Edition V1.4 has been
rewritten to take advantage of this unique z/OS function,
which can result in performance improvements.
• Enhanced ASCII support provides the ability to produce
code that contains ASCII string literals and character
constants. This allows ASCII dependent logic to con-
tinue working on ASCII platforms, thus eliminating the
need to fi nd all such places in the code and converting
them to EBCDIC when porting UNIX applications to z/OS.
• Performance enhancements: A new higher optimiza-
tion level, OPTIMIZE(3), provides the compiler’s highest
and most aggressive level of optimization. OPTIMIZE(3)
is suggested when the desire for run-time improve-
ment outweighs the concern for minimizing compilation
resources.
• DB2 preprocessor integration: The C/C++ compiler has
been enhanced to integrate the functionality of the DB2
precompiler. A new SQL compiler option enables the
compiler to process embedded SQL statements.