IBM z/OS - page 67

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.