IBM z/OS - Manual (Page 71)

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• Separate address space for TN3270 servers
• TCP/IP Sysplex health monitoring
Network Services benefi ts can include:
• Function for on demand Internet and intranet applications
• Multivendor, multiplatform connectivity
• Mainframe class of service over IP networks
• Dramatic improvements in TCP/IP performance include
optimization of the TCP/IP stack, and inclusion of a
number of performance related capabilities
z/OS UNIX
z/OS Version 1 Release 6 base elements
z/OS UNIX
z/OS UNIX is an integral element of z/OS and is a key ele-
ment of the zSeries’ open and distributed computing strat-
egy. Many middleware and application products that run
on z/OS use z/OS UNIX.
z/OS contains the UNIX application services (shell, utilities
and debugger) and the UNIX System Services (kernel and
runtime environment). The shell and utilities provide the
standard command interface familiar to interactive UNIX
users. z/OS includes all of the commands and utilities
specifi ed in the X/Open Company’s Single UNIX Specifi ca-
tion, also known as UNIX 95 or XPG4.2. The z/OS UNIX
Services Debugger provides a set of commands that
allow a C language program to be debugged interactively.
The command set is familiar to many UNIX users. With
Language Environment, z/OS supports industry standards
for C programming, shell and utilities, client/server appli-
cations, and the majority of the standards for thread man-
agement and the X/Open Single UNIX Specifi cation. The
combination of open computing and z/OS allows the trans-
parent exchange of data, easy portability of applications,
cross-network management of data and applications, and
the exploitation of traditional zSeries system strengths in
an open environment.
Highlights
• X/Open UNIX 95 Branded
• Permanent z/OS UNIX Kernel (restart capability pro-
vided in z/OS 1.3)
• Integrated/converged z/OS UNIX Sockets
• Web application and UNIX C program performance
improvements
• Improved z/OS UNIX setup
• Multiprocess/Multiuser Kernel Support
• Performance enhancements include recompiled and
optimized functions within the kernel, and shell and utili-
ties; addition of Socket Functions; use of Communica-
tion Storage Management buffer transfer instead of data
movement; and optimized NFS Logical File System.
• Multiprocess/MultiUser can allow faster process creation
for customers and reduced storage usage for servers.
• Semaphores without contention using the hardware Per-
form Locked Operation (PLO) instruction.
• Shared memory (captured storage) can reduce real stor-
age when sharing large amounts of virtual storage.
• UNIX System Services and UNIX debugger add support
for IEEE-fl oating point.
• UNIX System Services provides greater security granu-
larity for HFS and zFS fi le systems with support for
Access Control Lists (ACLs).