System Services, Sense and Respond with Workload Manager

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.