User Manuals: IBM SC34-7012-01 Recovery and Restart

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IBM SC34-7012-01 Recovery And Restart Manual (268 pages)

CICS Transaction Server for z/OS

Brand: IBM | Category: Server | Size: 1 MB

Table of Contents
5
Programs
5
Rebuilding the CICS State
5
Shunt
5
Shutdown
5
Transient Data
5
Communication
6
Transaction)
6
Unit of Work Recovery
6
URIMAP Definition
6
Systems Administration
7
Transaction
7
Xrc
7
Trademarks
8
How to Use this Book
9
Preface

9
Part 1. CICS Recovery and Restart Concepts

13
Chapter 1. Recovery and Restart Facilities

15
Chapter 2. Resource Recovery in CICS

25
- Units of Work
  25
  - Shunted Units of Work
    25
  - Locks
    26
  - Synchronization Points
    27
  - Unit of Work
    28
- CICS Recovery Manager
  29
- CICS System Log
  33
  - Information Recorded on the System Log
    33
  - System Activity Keypoints
    34
- Forward Recovery Logs
  34
- User Journals and Automatic Journaling
  34
Chapter 3. Shutdown and Restart Recovery

37
- Normal Shutdown Processing
  37
  - First Quiesce Stage
    37
  - Second Quiesce Stage
    38
  - Third Quiesce Stage
    38
  - Warm Keypoints
    39
  - Shunted Units of Work at Shutdown
    39
  - Flushing Journal Buffers
    40
- Immediate Shutdown Processing (PERFORM SHUTDOWN IMMEDIATE)
  40
- Shutdown Requested by the Operating System
  41
- Uncontrolled Termination
  42
- The Shutdown Assist Transaction
  42
- Cataloging CICS Resources
  43
  - Global Catalog
    43
  - Local Catalog
    44
- Shutdown Initiated by CICS Log Manager
  45
  - Effect of Problems with the System Log
    45
- How the State of the CICS Region Is Reconstructed
  46
  - Overriding the Type of Start Indicator
    47
  - Warm Restart
    47
  - Emergency Restart
    47
  - Cold Start
    48
  - Emergency Restart
    48
  - Dynamic RLS Restart
    49
- Recovery with VTAM Persistent Sessions
  50
  - Running with Persistent Sessions Support
    50
  - Running Without Persistent Sessions Support
    52
Part 2. Recovery and Restart Processes

55
- Communication
  55
Chapter 4. CICS Cold Start

57
- Starting CICS with the START=COLD Parameter
  57
- Chapter 4, "CICS Cold Start
  57
- Files
  58
  - Temporary Storage
    59
  - Transient Data
    59
  - Transactions
    60
  - Journal Names and Journal Models
    60
  - LIBRARY Resources
    60
  - Programs
    60
  - Start Requests (with and Without a Terminal)
    60
  - Resource Definitions Dynamically Installed
    60
  - Monitoring and Statistics
    61
  - Terminal Control Resources
    61
  - Distributed Transaction Resources
    62
  - Dump Table
    62
- Starting CICS with the START=INITIAL Parameter
  62
  - User Journals
    63
Chapter 5. CICS Warm Restart

65
- Rebuilding the CICS State after a Normal Shutdown
  65
- Chapter 5, "CICS Warm Restart
  65
  - Warm Restart
    65
  - Files
    66
  - For Recovery
    66
  - Temporary Storage
    67
  - Transient Data
    67
  - Transactions
    68
  - LIBRARY Resources
    68
  - Programs
    68
  - Start Requests
    69
  - Monitoring and Statistics
    69
  - Journal Names and Journal Models
    70
  - Terminal Control Resources
    70
  - Distributed Transaction Resources
    71
  - URIMAP Definitions and Virtual Hosts
    71
Chapter 6. CICS Emergency Restart

73
Chapter 7. Automatic Restart Management

79
- CICS ARM Processing
  79
- Chapter 7, "Automatic Restart Management
  79
  - Registering with ARM
    80
  - Waiting for Predecessor Subsystems
    80
  - De-Registering from ARM
    80
  - Start=Auto
    80
  - Failing to Register
    81
  - ARM Couple Data Sets
    81
- CICS Restart JCL and Parameters
  81
- Workload Policies
  82
- Connecting to VTAM
  82
  - The COVR Transaction
    83
  - Messages Associated with Automatic Restart
    83
- Automatic Restart of CICS Data-Sharing Servers
  83
  - Server ARM Processing
    83
Chapter 8. Unit of Work Recovery and Abend Processing

85
Chapter 9. Communication Error Processing

109
- Terminal Error Processing
  109
  - Node Error Program (DFHZNEP)
    109
  - Terminal Error Program (DFHTEP)
    109
- Intersystem Communication Failures
  110
Part 3. Implementing Recovery and Restart

111
Chapter 10. Planning Aspects of Recovery

113
- Application Design Considerations
  113
- System Definitions for Recovery-Related Functions
  116
  - System Log Stream
    116
  - System Recovery Table (SRT)
    116
- Documentation and Test Plans
  117
  - Transaction List Table (XLT)
    117
Chapter 11. Defining System and General Log Streams

119
- Defining Log Streams to MVS
  120
- Defining System Log Streams
  120
  - Specifying a JOURNALMODEL Resource Definition
    121
  - Model Log Streams for CICS System Logs
    122
  - Recovery Considerations
    122
  - Activity Keypointing
    124
  - System Logs
    125
  - Log-Tail Deletion
    126
- Defining Forward Recovery Log Streams
  128
  - Model Log Streams for CICS General Logs
    129
  - Merging Data on Shared General Log Streams
    130
- Defining the Log of Logs
  130
  - Log of Logs Failure
    131
  - Reading Log Streams Offline
    131
- Effect of Daylight Saving Time Changes
  132
  - Adjusting Local Time
    132
  - Time Stamping Log and Journal Records
    132
Chapter 12. Defining Recoverability for CICS-Managed Resources

135
- Recovery for Transactions
  135
  - Defining Transaction Recovery Attributes
    135
- Recovery for Files
  137
- Recovery for Intrapartition Transient Data
  143
  - Backward Recovery
    143
  - Forward Recovery
    145
  - Transient Data Queues
    145
  - Recovery for Extrapartition Transient Data
    146
  - Input Extrapartition Data Sets
    146
  - Output Extrapartition Data Sets
    147
  - Using Post-Initialization (PLTPI) Programs
    147
- Recovery for Temporary Storage
  147
  - Backward Recovery
    147
  - Forward Recovery
    148
- Recovery for Web Services
  148
Chapter 13. Programming for Recovery

153
- Designing Applications for Recovery
  153
  - Splitting the Application into Transactions
    153
  - SAA-Compatible Applications
    155
- Program Design
  155
- Managing Transaction and System Failures
  161
  - Transaction Failures
    161
  - Transaction Restart
    161
  - System Failures
    163
  - Handling Abends and Program Level Abend Exits
    163
  - Use of
    163
  - User Exits
    163
  - Processing the IOERR Condition
    165
  - START TRANSID Commands
    165
  - PL/I Programs and Error Handling
    165
- Locking (Enqueuing On) Resources in Application Programs
  166
- User Exits for Transaction Backout
  172
  - Where You Can Add Your Own Code
    172
  - XRCINIT Exit
    173
  - XRCINPT Exit
    173
  - XFCBFAIL Global User Exit
    173
  - XFCLDEL Global User Exit
    174
  - XFCBOVER Global User Exit
    174
  - XFCBOUT Global User Exit
    174
  - Coding Transaction Backout Exits
    174
Chapter 14. Using a Program Error Program (PEP)

175
- The CICS-Supplied PEP
  175
- Your Own PEP
  176
- Omitting the PEP
  177
Chapter 15. Resolving Retained Locks on Recoverable Resources

179
Chapter 16. Moving Recoverable Data Sets that Have Retained Locks

195
- Procedure for Moving a Data Set with Retained Locks
  195
  - Using the REPRO Method
    195
  - Using the EXPORT and IMPORT Functions
    197
  - Rebuilding Alternate Indexes
    198
Chapter 17. Forward Recovery Procedures

199
Chapter 18. Backup-While-Open (BWO)

215
- BWO and Concurrent Copy
  215
  - BWO and Backups
    215
- BWO Requirements
  216
  - Hardware Requirements
    217
- Which Data Sets Are Eligible for BWO
  217
- How You Request BWO
  218
- Removing BWO Attributes
  220
- Systems Administration
  220
- BWO Processing
  221
  - File Opening
    222
  - File Closing (Non-RLS Mode)
    224
  - Shutdown and Restart
    225
  - Controlled Shutdown
    225
  - Data Set Backup and Restore
    225
  - Forward Recovery Logging
    227
  - Forward Recovery
    228
  - For BWO
    228
  - Recovering VSAM Spheres with Aixs
    229
- An Assembler Program that Calls DFSMS Callable Services
  230
Chapter 19. Disaster Recovery

235
- Why Have a Disaster Recovery Plan
  235
- Disaster Recovery Testing
  236
- Six Tiers of Solutions for Off-Site Recovery
  237
  - Tier 0: no Off-Site Data
    237
  - Tier 1 - Physical Removal
    237
  - Tier 2 - Physical Removal with Hot Site
    239
  - Tier 3 - Electronic Vaulting
    239
  - Tier 0-3 Solutions
    240
  - Tier 4 - Active Secondary Site
    241
  - Tier 5 - Two-Site, Two-Phase Commit
    243
  - Tier 6 - Minimal to Zero Data Loss
    243
  - Tier 4-6 Solutions
    245
- Disaster Recovery and High Availability
  246
- CICS Emergency Restart Considerations
  251
  - Indoubt and Backout Failure Support
    251
  - Remote Site Recovery for RLS-Mode Data Sets
    251
- Final Summary
  252
Part 4. Appendixes

253
Notices

255
- Operation of
  255
- Trademarks
  256
Bibliography

257
Accessibility

259
- Index
  261
- Readers' Comments - We'D Like to Hear from You
  265

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User Manuals: IBM SC34-7012-01 Recovery and Restart

IBM SC34-7012-01 Recovery And Restart Manual (268 pages)

Table of Contents

Preface

Part 1. CICS Recovery and Restart Concepts

Chapter 1. Recovery and Restart Facilities

Chapter 2. Resource Recovery in CICS

Chapter 3. Shutdown and Restart Recovery

Part 2. Recovery and Restart Processes

Chapter 4. CICS Cold Start

Chapter 5. CICS Warm Restart

Chapter 6. CICS Emergency Restart

Chapter 7. Automatic Restart Management

Chapter 8. Unit of Work Recovery and Abend Processing

Chapter 9. Communication Error Processing

Part 3. Implementing Recovery and Restart

Chapter 10. Planning Aspects of Recovery

Chapter 11. Defining System and General Log Streams

Chapter 12. Defining Recoverability for CICS-Managed Resources

Chapter 13. Programming for Recovery

Chapter 14. Using a Program Error Program (PEP)

Chapter 15. Resolving Retained Locks on Recoverable Resources

Chapter 16. Moving Recoverable Data Sets that Have Retained Locks

Chapter 17. Forward Recovery Procedures

Chapter 18. Backup-While-Open (BWO)

Chapter 19. Disaster Recovery

Part 4. Appendixes

Notices

Bibliography

Accessibility

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