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by Tom Wasik, John Unterholzner, John A. O'Leary, Brad Habbershaw, Bruce Dennis
JES3 to JES2 Migration Considerations
Front cover
Notices
Trademarks
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Preface
Authors
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Part 1 The decision to migrate from JES3 to JES2
Positioning for migration
Information provided in this book
Chapter 1. How JES2 works
1.1 What is a job entry subsystem (JES)?
1.2 JES2 overview
1.2.1 JES2 environment
1.2.2 JES2 PROC JCL
1.2.3 MAS members
1.2.4 SPOOL
1.2.5 Checkpoint data set
1.2.6 Functional subsystem interface (FSI)
1.2.7 Remote job entry (RJE)
1.2.8 Network job entry (NJE)
1.2.9 JESXCF
1.2.10 JES2 initialization deck
1.2.11 JES2 monitor
1.3 JES2 internal components
1.3.1 Processor control element (PCE)
1.3.2 Daughter task element (DTE)
1.3.3 Device control table (DCT)
1.3.4 HASP communication tables (HCT and HCCT)
1.3.5 Checkpointed data areas
1.4 JES2 start types
1.5 Activation levels
1.6 JES2 job processing
1.6.1 Pre-execution job phases
1.6.2 Post-execution job phases
Chapter 2. Terminology differences
2.1 JES3 terminology
2.2 Different use of terms
2.2.1 Non-specific JES2 and JES3 references
2.2.2 Collections of JESes
2.2.3 JES startup processing
2.2.4 JES parameter statements
2.2.5 SYSOUT processors
2.2.6 Remote workstations
2.2.7 JES threads
2.2.8 Multiple JES2 images
2.2.9 JES initialization statements
Chapter 3. Differences between JES2 and JES3 are becoming smaller
3.1 JES3 functions
3.1.1 Dependent Job Control (DJC)
3.1.2 Deadline scheduling
3.1.3 Priority aging
3.1.4 HSM early recall
3.1.5 Main Device Scheduling (MDS)
3.1.6 JES3 device control and device fencing
3.1.7 Inish deck checker
3.1.8 JES3 Monitoring Facility
3.1.9 Disk reader
3.2 JES3 features
3.2.1 Data Set Name disposition conflict resolution
3.2.2 Job class groups
3.2.3 Single point of control
3.2.4 Printer naming conventions usage
3.3 On-the-surface convergence
3.3.1 JES3 role in today’s zWorld
3.3.2 Job correlator
3.3.3 MVS resource serialization: JCL examples
3.3.4 JES2 symbols for instream data
3.3.5 New PARMDD EXEC keyword
3.3.6 JES new functions in z/OS V2R1
3.4 Checklist
Chapter 4. JECL and JCL differences
4.1 JCL processing
4.1.1 SYSOUT HOLD processing
4.1.2 Scanning jobs for JCL errors
4.1.3 OUTPUT statement parameters
4.1.4 Command statements
4.2 JECL statements
4.2.1 PROCESS and DATASET JECL
4.2.2 FORMAT JECL
4.2.3 MAIN JECL
4.2.4 NET JECL
4.2.5 NETACCT JECL
4.2.6 OPERATOR JECL
4.2.7 PAUSE JECL
4.2.8 ROUTE XEQ JECL
4.3 Other JCL considerations
4.3.1 Allocation differences
4.3.2 JCL standards
4.3.3 Retaining tapes
4.4 JES2 options
4.5 Identifying jobs that require changes
4.6 Reference information
Chapter 5. Migration considerations
5.1 Making an informed decision
5.2 Discovery analysis process
5.2.1 Identifying JCL and JECL changes
5.2.2 Activating the exit
5.2.3 Understanding the output
5.2.4 JES JECL cards
5.2.5 Other components for discovery analysis
5.2.6 The use of a Parallel Sysplex
5.3 Building a business case
Part 2 Details of the migration
Chapter 6. Planning for a JES3 to JES2 migration
6.1 Planning
6.1.1 Positioning moves
6.2 Choosing a target system
6.2.1 Storage management
6.2.2 Education
6.2.3 Vendor management
6.3 Migration process
6.3.1 JES2 setup
6.4 Functional testing
6.5 System and integration testing
6.6 Implementation
Chapter 7. JES procs and initialization decks
7.1 Introduction
7.2 Types of start
7.3 Initialization statements
7.3.1 Dynamic changes
7.3.2 Verifying the JES initialization deck
7.4 JES procedures
7.4.1 The JES3 procedure
7.4.2 Typical JES2 procedure
7.4.3 Other procedures
7.5 Automation considerations
Chapter 8. User exits
8.1 JES3 user exits
8.2 Source code changes (usermods)
Chapter 9. Operational considerations
9.1 Operational differences
9.2 Single System Interface
9.3 Operator commands
9.3.1 Commands
9.3.2 Command filtering
9.3.3 Syntax checking of JES commands
9.4 Consoles and DLOG
9.4.1 Automation considerations
9.5 System Display and Search Facility
9.5.1 Starting writers on printers
9.6 Starting JES
9.6.1 In a JES3 environment
9.6.2 In a JES2 environment
9.6.3 JES2 Checkpoint Reconfiguration Dialog
9.6.4 Starting NJE lines and nodes
9.7 Shutdown considerations
9.8 Dynamic changes
9.9 DFSMSdfp ACS routines &SYSNAME and &SYSPLEX
9.10 DFSMShsm
9.10.1 Difference for non-SMS managed volumes and data sets
9.10.2 Difference for SMS-managed volumes and data sets
9.11 Miscellaneous other differences
9.11.1 Duplicate job names and multiple system signons
9.11.2 Display of job numbers and job IDs
9.11.3 System symbols
9.11.4 MVS checkpoint/restart
9.11.5 Network Resource Monitor
9.11.6 Printer naming restrictions
Chapter 10. Related products
10.1 JES-neutral interface
10.2 Products that interact with JES
10.3 Print output and archive products
10.4 Batch schedulers
10.5 JES-managed printers
10.6 NJE and RJP devices
10.7 JCL generators
10.8 JES operator, users, and administrator tools
10.9 SMF analysis
10.10 Users of JES exits
10.11 JCL checkers
10.12 Application software control
10.13 Other products
10.14 Automation
10.15 Home-grown ISPF-based tools
10.16 Migration tools
10.16.1 Migration assistance products
Chapter 11. Security considerations
11.1 Security considerations
11.1.1 JES Started Task
11.1.2 JES data sets
11.2 Initialization parameters that affect security
11.3 JES-related SAF classes
11.3.1 JES3 consoles
11.3.2 FACILITY class
11.3.3 DEVICES class
11.3.4 NODES class
11.3.5 WRITER class
11.3.6 JESINPUT class
11.3.7 JESSPOOL class
11.3.8 JES SPOOL data sets
11.3.9 OPERCMDS class
Chapter 12. Workload Manager considerations
12.1 JES2 address spaces
12.2 WLM-managed initiators
12.3 WLM scheduling environments
12.4 WLM classification rules
12.4.1 Defining z/OS WLM classification rules for performance policies
Chapter 13. Performance and throughput considerations
13.1 Performance of JES2 compared to JES3
13.1.1 Steady state processing
13.2 Throughput considerations
13.2.1 MAS considerations
13.2.2 Setting limits and counts
13.2.3 Configuring work queues
Chapter 14. Output processing
14.1 Held on spool for TSO
14.2 Processed by an external writer
14.2.1 IBM supplied external writer
14.2.2 Vendor-supplied external writers
14.3 Local printing
14.3.1 Printer naming conventions
14.3.2 Advanced Function Printers (Infoprint)
14.3.3 JES printers
14.4 Remote printing
14.4.1 BSC remote workstations
14.4.2 SNA remote workstations
14.5 Archiving output
14.5.1 JES3 dump job (DJ)
14.5.2 JES2 OFFLOAD
14.5.3 Limitation between JES3 dump job and JES2 spool offload
14.6 Spin processing
14.7 Printer processing
14.8 SYSOUT class redirection
Chapter 15. NJE considerations
15.1 Networking protocols
15.2 Product considerations
15.3 Operating system considerations
15.4 Pathing differences
15.5 JES2 subnets
15.6 Performance considerations
15.7 Initialization statement comparison
15.8 NJE examples
15.8.1 JES3 example
15.8.2 JES2 example
15.9 NJE exits
15.10 Security considerations
15.11 SMF considerations
15.12 Entering commands from a remote node
15.13 NJE incompatibilities
15.13.1 JES3 NJE functions not supported in JES2
15.13.2 Unnecessary JES3 NJE parameters
15.13.3 Additional JES2 NJE parameters
15.13.4 BDT parameters
15.14 Using networking with TCP/IP
15.15 JES3 TCP/IP networking
15.15.1 The NETSERV address space
15.15.2 Defining TCP/IP NJE definitions with commands
15.15.3 NJE security enhancements
15.15.4 JES3 commands to start TCP/IP NJE
15.16 JES2 supported protocol for TCP/IP networking
15.16.1 Secure sign-on protocol
15.16.2 TCP/IP NJE address space
15.16.3 JES2 NODE definitions
15.17 Migration considerations
15.17.1 Single event
15.17.2 New JESplex
Chapter 16. Accounting and chargeback considerations
16.1 Overview of resource usage accounting within IT
16.2 Chargeback overview
16.3 SMF record types
16.3.1 SMF type 6: External writer
16.3.2 SMF type 24: JES2 spool offload
16.3.3 SMF type 25: JES3 device allocation
16.3.4 SMF type 26: job purge
16.3.5 SMF type 30: common address space work
16.3.6 SMF type 43: JES start
16.3.7 SMF type 45: stop
16.3.8 SMF type 59: MVS/BDT
16.4 Job accounting information
16.4.1 Scanning the JOB statement accounting field
16.5 Processing differences
Chapter 17. Availability considerations
17.1 Standard practices for availability
17.2 Tailoring JES for best availability
17.2.1 JES3 global-local communication
17.2.2 JES3 spool partitions
17.2.3 JES3 spool volume recovery
17.2.4 JES3 system select phase
17.2.5 JES2 checkpoint data set
17.2.6 Coupling facility structure duplexing
17.2.7 JES2 SPOOL partitioning
17.2.8 JES2 SPOOL affinity
17.3 Updating the configuration
17.3.1 In a JES3 environment
17.3.2 In a JES2 environment
17.3.3 Secondary JES
17.4 Unplanned outage
17.4.1 JES3 unplanned outages
17.4.2 JES2 unplanned outage
17.4.3 JES2 abend
17.4.4 JES2 checkpoint data set errors
Appendix A. Sample JES3 exit to analyze JECL usage
Sample JES3 user exit 33
Appendix B. Comparison of JES3 and JES2 commands
List of commonly used JES3 and JES2 commands
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