Delegates will learn how to
- describe the functions of MVS and JES2
- use GRS effectively
- exploit program management
- explain how the dispatcher works
- describe Cross Memory Services (XMS) and how it works
- install user SVCs
- describe how MVS invokes recovery and when to use ESTAE routines
- explain how WLM works to manage z/OS resources
- design and setup the DASD subsystem
- isolate I/O problems.
Job processing; SSI; input phase; internal readers; initiators; SWA control blocks; ENQs; allocation; PPT; job termination; output phase.Subsystem Interface (SSI)
Why Subsystem Interface?; SSI - a universal tool; The Master Subsystem (MSTR); ES services via SSI; Establishing a subsystem; Defining the subsystem to MVS; Setting up SSI; Starting a subsystem; Initialising a subsystem; Asking for subsystem service; SSI at work...; Dynamic SSI; Chapter Review; Subsystem Lab.Resource Control
Resource serialization and how it is accomplished through the use of ENQ/DEQ sequences; shared DASD; GRS & Sysplex; locking; lock categories; SETLOCK, SPIN & SUSPEND; lock manager processing.Program Manager
The search sequence used by the program manager when attempting to load a module; performance and load module integrity issues; using LOAD; LINK; XCTL; Linkage Stack; control blocks; JOBLIB/STEPLIB.Dispatcher
Units of work- SRBs & TCBs; dispatching sequence; address space structure; ASCB/ASXB contents; TCB contents.Inter Address Space Communication
Hiperspaces; data spaces; cross memory services; service request blocks (SRBs); the cross-system coupling facility (XCF).SVC Processing
Installing SVC routines in an MVS system; SVC types; SVC FLIH; status saving; SVC coding conventions; SVCUPDTE facility.Recovery Termination Manager
Recovery routines available to user programs and the Recovery Termination Manager; RMS; program termination types; ESPIE; ESTAE; FRR routines.Workload Manager
WLM's purpose; WLM's tools; compatibility mode; dispatching priorities; storage isolation; logical swapping; user & system think times; goal mode implications; classification rules; response time goals; velocity goals; discretionary goals.Direct Access Storage Devices
Track formats; CKD format; RPS; VTOCs; DSCB types; VTOC Index; VTOC listing; Catalogs; opening data sets; SMS.Data Management
Access methods; DCB concepts; OPEN & TIOT; DEB; DCB merge; open processing; channel programs; ECBs & IOBs; EXCP; QSAM; synchronising the I/O; analysing completed I/O; close processing.IOS and its Drivers
IOS; IOS drivers & components; building an IOQ; building an ORB; CSS at work; I/O interrupt handler; post status; VSAM; control intervals; linear data sets; PDSEs; the ACB; open processing; Get & Put; VSAM control blocks.
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