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4.3.13 Summary of MVS JCL Statements .................... 88
4.4 JECL
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
4.4.2 Comparison of POWER and JES2 JECL - A Summary
......... 89
4.4.3 Summary of JES2 JECL - A Table
..................... 90
4.5 VSE and MVS JCL Comparison Example
.................... 91
4.5.1 Sample VSE JCL
................................ 92
4.5.2 Sample MVS JCL
............................... 93
4.5.3 Sample VSE plus Carry-Over
........................ 94
Chapter 5. Disk and Tape Storage Considerations
................ 97
5.1 Access Method Similarities and Differences
.................. 97
5.1.1 Access Methods
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
5.1.2 Operating System Implementations
.................... 98
5.1.3 Miscellaneous Functions
. . . . . . . . . . . . . . . . . . . . . . . . . . . 99
5.2 Data Set Naming Considerations
........................ 99
5.2.1 VSE Considerations
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
5.2.2 OS/390 Considerations
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
5.3 Storage and Space Management
....................... 100
5.3.1 VSE Considerations
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
5.3.2 OS/390 Considerations
. . . . . . . . . . . . . . . . . . . . . . . . . . . 100
5.3.3 System Managed Storage
......................... 100
5.3.4 Implementing DFSMS
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
5.4 Tape Similarities and Differences
....................... 103
5.4.1 Volume Interchangeability
. . . . . . . . . . . . . . . . . . . . . . . . . 103
5.4.2 Standard Labels
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
5.4.3 No Labels
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
5.4.4 Nonstandard Labels
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
5.4.5 Bypass Label Processing Facility in OS/390
.............. 106
5.5 DASD Similarities and Differences
...................... 108
5.5.1 Volume Interchangeability
. . . . . . . . . . . . . . . . . . . . . . . . . 108
5.5.2 DASD (VTOC) Processing
......................... 108
5.5.3 Indexed VTOC Considerations (OS/390)
................. 109
5.6 VSAM Differences
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
5.6.1 Introduction
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
5.6.2 OS/390 Catalogs
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
5.6.3 OS/390 Catalog Management
....................... 114
5.6.4 OS/390 - VSE/VSAM Catalog Compatibility
............... 117
5.6.5 VSAM Functional Differences
....................... 119
5.6.6 Data Sharing and Integrity
......................... 125
5.6.7 Programming Languages and VSAM Support
............. 131
5.6.8 VSAM Error and Reason Code Compatibility
.............. 131
5.6.9 DFSORT and VSAM Considerations
................... 131
Chapter 6. CICS
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
6.1 Introduction
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
6.1.1 Overview CICS Transaction Server
................... 133
6.1.2 Essential Supplemental Reading and Migration Support Material
. 134
6.1.3 General Compatibility Comments
.................... 135
6.1.4 Virtual Storage Considerations for MVS
................. 135
6.1.5 CICS General System Considerations
.................. 136
6.1.6 CICS Macro Resource Definition Table Changes
........... 140
6.1.7 CSD and RDO Considerations
...................... 143
6.1.8 CICS System Data Sets Requirements
................. 145
6.1.9 CICS System Program Interface and Exits
............... 147
6.1.10 CICS Transaction Security
........................ 149
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