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26 Cards in this Set
- Front
- Back
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zOS JCL (Job Control Language) DD Statement DISP Parameter |
Can Have up to a Maximum of Three Fields Specified O06 |
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zOS JCL Architectural Limits
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• Maximum Number of DD Statements per Step (with default TIOT size of 32KB) - 1,635
• Maximum Number of In-stream Procedures per Job - 15 • Maximum Number of Libraries per JCLLIB ORDER= Parameter - 15 • Maximum Number of Steps per Job - 255 |
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zOS JCL Name Maximums
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• DDNAME (Data Definition Name) - 8 Characters
• JOBNAME (Job Name) - 8 Characters • STEPNAME (Step Name) - 8 Characters |
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zOS JCL Statement Parameters
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• DD - DCB, DISP, DSN, DUMMY, SPACE, and SYSOUT
• EXEC - COND, and PARM • JOB - MSGCLASS, MSGLEVEL, NOTIFY, PASSWORD, and USER |
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zOS JCL Statement |
Representing a Step on a One to One Basis is EXEC
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zOS Program IEFBR14 Function
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zOS Program IEFBR14 does nothing at all, but can be leveraged indirectly to have the system delete and create datasets via disposition processing
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zOS Reserved DDNAMES
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• JOBLIB
• STEPLIB • SYSABEND |
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Spool Definition is
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Simultaneous Peripheral Operation On-Line
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zOS JCL Input Spooling is
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Implemented by DD
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zOS JES Initiator Creators
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• JES (Job Entry Subsystem)
• WLM (Workload Manager) |
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zOS JES Initiators
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Have the Broad Scope of Initiating, Executing and Terminating Jobs
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zOS JES2 Chronological Job Phases
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• Input Phase
• Conversion Phase • Processing Phase • Output Phase • Print/Punch (Hardcopy) Phase • Purge Phase |
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zOS Spooler Examples
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• JES2
• JES3 |
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Application Development Life Cycle Chronological Phases
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• Requirements
• Analysis • Design • Code/Unit Test • User/Performance/Integration/System Test • Promote to Production • Maintenance • Sunset |
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ASCII/EBCDIC Bit Assignments
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• Character A (ASCII) - B'01000001' (X'41')
• Character A (EBCDIC) - B'11000001' (X'C1') • Character a (ASCII) - B'01100001' (X'61') • Character a (EBCDIC) - B'10000001' (X'81') • Character 1 (ASCII) - B'00110001' (X'31') • Character 1 (EBCDIC) - B'11110001' (X'F1') |
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Numbering Systems Types
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• Binary - Base 2
• Decimal - Base 10 • Hexadecimal - Base 16 • Octal - Base 8 |
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zOS Programming Language Classifications
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• Assembler - Compiled Only
• C/C++ - Compiled Only • CLIST (Command List) - Interpretive Only • COBOL (Common Business Oriented Language) - Compiled Only • Java - Compiled or Interpretive • JCL (Job Control Language) - Interpretive Only • PL/I - Compiled Only • REXX (REstructured eXtended eXecutor) - Compiled or Interpretive |
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zOS Programming Module Chronological Processing
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• Precompiler (Optional)
• Compiler • Binder |
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zOS Programming Module Chronological Types
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• Source
• Object • Load |
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Commit and Roll Back Definitions
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• Commit Makes All Pending Changes Permanent
• Roll Back Cancels All Pending Changes |
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OLTP (Online Transaction Processing) Rapid Response Time Benefits
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• Improving System Response Time from 3 to 2 seconds saves a user 64.8 minutes per day
• Improving System Response Time from 3 to1 seconds saves a user 136.8 minutes per day • Improving System Response Time from 3 to 0.6 seconds saves a user 178.4 minutes per day • Improving System Response Time from 3 to 0.3 seconds saves a user 247.2 minutes per day |
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OLTP (Online Transaction Processing) System Response Time Components
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• Communications Response Time
• Computer Response Time |
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OLTP (Online Transaction Processing) Transaction Response Time Components
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• System Response Time• User Response Time
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zOS OLTP (Online Transaction Processing) Examples
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• CA-IDMS/DC (Integrated Database Management System Data Communication)
• CTS (CICS Transaction Server) • IMS/TM (Information Management System/Transaction Manager) |
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zOS OLTP (Online Transaction Processing) Program Design
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• Pseudo-conversational Program Design Optimizes Computer Resources While Maintaining a High Level of User Interaction
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Date/Time Related Definitions
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• Epoch Time - Number of seconds since 00:00:00 UTC 1 January 1970, excluding leap seconds
• GMT (Greenwich Mean Time) - Time zone that all local time zones offset from • Gregorian Date - Year, month and day formatted YYMMDD/YYYYMMDD • ISO 8601 - International Date/Time standard formatted YYYY-MM-DD • Julian Date - Year and sequential day of the year used in zOS Control Blocks and SMF Records formatted YYDDD/YYYYDDD/YY.DDD/YYYY.DDD • Lilian Days - Number of days since the beginning of the Gregorian Calendar on October 15, 1582• POSIX Time - Number of seconds since 00:00:00 UTC 1 January 1970, excluding leap seconds• UNIX Time - Number of seconds since 00:00:00 UTC 1 January 1970, excluding leap seconds• UTC (Coordinated Universal Time) - Time standard that all of the world coordinates with |
