Elements of Systems Programming

Tasks of a system programmer

• The IPL Process and Associated Parameters

  Parmlib members:
  · LOADxx
  · NUCLSTxx
  · IEASYSxx
  · COMMNDxx
  · IEACMD00
  · CONSOLxx

  IMSI with suggestions for use
  · Logical parmlib
  · CSA and SQA
  · Use and size

  Paging
  · How many page data sets
  · Placing and sizing page data sets

   

• Console set up Commands include:
  · D IPLINFO
  · D U,IPLVOL
  · D SYMBOLS
  · D PARMLIB
  · D ASM

• Programs and Virtual Storage layout
  Parmlib members covered for general programs:
  · MSTJCLxx
  · PROGxx (LNKLSTxx IEAAPFxx)
  · IEAFIXxx
  · IEALPAxx
  · LPALSTxx
  · IEASVCxx
  · IFAPRDxx
  Commands for dynamic changes
  · SETPROG
  · SET PROG
  Parmlib members covered for special programs and subsystems:
  · IEFSSNxx
  · SCHEDxx
  
   
• JES2
  Locating the JESPARM data and Reviewing the JESPARM data, especially:
  · SPOOL and Checkpoint data set size, number and location
  · BUFSIZE, TGSIZE and TRKCELL

  JES2 display commands, including variations of:
  · $D SPL

  JES2 commands for reconfiguring the checkpoint data set use of CF for checkpoint

• Sysplex Considerations

SYSPLEX, overview
· Policy

Parmlib members covered for SYSPLEX:
· COUPLExx

System symbols and filtering within LOADxx
· IEASYMxx
· D SYMBOLS

Parmlib members covered for GRS:
· IEASYSxx GRS
· GRSCNFxx
· GRSRNLxx

Data in Memory
Use of Coupling Facility
Use of Virtual Storage

Parmlib members covered for LLA and VLF:
· CSVLLAxx
· COFVLFxx

SMF and GTF
Overview of SMF
· Description of SMF record types
· The SMF Header

Parmlib members for SMF:
· SMFPRMxx

Parmlib members covered for GTF:
· GTFPARM

General System Recovery, Diagnostic Facilities and SMP/E Recovery flow
· system recovery
· task recovery

User dumps, system dumps, DAE
· ADYSETxx
· User dump tailoring
· System Dump Data Sets
SMP/E overview

• Devices and Related Parameters

Parmlib members:
· VATLSTxx
· CONFIGxx
· IECIOSxx
· ALLOCxx
· DEVSUPxx
· IGDSMSxx

Device information and HCD
· PAV
· The role of the Workload Manager in PAV

Configuration and device display commands
· D M
· D CONFIG=xx

 

• Channels: ESCON, FICON CF links and OSA
  Comparison of channel types
  Terminology – ESCON/FICON
  Cabling rules –cascading configurations
  ESCON Directors
  HCD and ESCON/FICON
  ESCON manager
  OSA connections