IBM z/OS - Manual (Page 59)

59
The msys for setup dialogs use defaults and best prac-
tices values whenever possible and derive low-level values
from answers to high-level questions. After the confi gura-
tion parameters have been specifi ed, msys for Setup can
automatically update the system confi guration directly. The
user can see in detail what the changes will be before they
are made.
Also, with z/OS 1.5 msys for Setup can use the IBM Direc-
tory Server, OpenLDAP, on any IBM platform including
OpenLDAP on z/OS UNIX System Services. This can sim-
plify the initialization of msys for setup, and can make the
Management Directory virtually transparent to the user.
The following functions can be confi gured using msys for
Setup: Parallel Sysplex clustering, TCP/IP, UNIX System
Service, Language Environment ® , LDAP, RMF ™ , ISPF, FTP,
and DB2 UDB for z/OS V8.
System Services
z/OS Version 1 Release 6 base elements and components
Base Control Program (BCP)
JES2
ESCON Director Support
MICR/OCR Support
Bulk Data Transfer base
DFSMSdfp
EREP/ MVS High Level Assembler ICKDSF
ISPF
TSO/E
3270 PC File Transfer Program
FFST ™ /ESA
TIOC
z/OS Version 1 Release 6 optional priced features
DFSMSdss ™
DFSMShsm ™
DFSMSrmm ™
DFSMStvs
Bulk Data Transfer (BDT) File to File
Bulk Data Transfer SNA NJE
The backbone of the z/OS system is the Base Control Pro-
gram (BCP) with JES2 or JES3. These provide the essential
services that make z/OS the system of choice when work-
loads must be processed reliably, securely, with complete
data integrity and without interruption. The BCP includes the
I/O confi guration program (IOCP), the Workload Manager
(WLM), systems management facilities (SMF), the z/OS
UNIX Systems Services kernel, and support for Unicode.
Sense and Respond with Workload Manager
Workload Manager (WLM) addresses the need for manag-
ing mixed workload distribution, load balancing and the
distribution of computing resources to competing workloads.
It does this while providing fewer, simpler system externals.
Performance management goals are expressed in Service
Level Agreement terms. All this is done with a single policy
that can be used across the sysplex to provide a single con-
trol point, eliminating the need to manage each individual
image.
Dynamic balancing of JES2 batch initiators across a sysplex
has been enhanced in z/OS 1.4 to provide better utilization
of processor resources. WLM is designed to check every
10 seconds to see if re-balancing is required. WLM is more
aggressive in reducing initiators on constrained systems and
starting new ones on less utilized systems, helping to ensure
that processors are more evenly utilized.