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by Frank De Gilio Pradeep Gohil Nick Garrod, Randy Frerking, Rich Jackson, Kellie M
Walmart and the CICS Asynchronous API: An Adoption Experience
Front cover
Notices
Trademarks
Preface
Authors
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Chapter 1. Executive summary
1.1 Why Walmart chose the IBM CICS Asynchronous API
1.1.1 Ease of Use
1.1.2 Risk Free
1.1.3 Successful Service Delivery
1.2 Moving Forward
Chapter 2. Background
2.1 Asynchronous Processing
2.2 IBM CICS and the CICS Asynchronous API
2.2.1 IBM CICS Transaction Server
2.2.2 CICS Asynchronous API
2.3 Walmart and the Event Processing System
2.3.1 Walmart at a Glance
2.3.2 Walmart Event Processing System (EPS)
2.4 Background Summary
Chapter 3. Requirements and challenges
3.1 Volume
3.2 Searching
3.3 Service Level Agreement
3.4 Data Repository
3.5 Data Structure
3.5.1 Event object
3.5.2 Format conversion
3.6 Fundamental I/O Requirements
Chapter 4. Our initial sequential approach
4.1 Additional background and basic approach
4.1.1 Search Criteria
4.1.2 Sequential Processing
4.1.3 Results
4.2 Native VSAM
4.2.1 Results
4.2.2 Tradeoffs
4.2.3 Disclaimers
4.3 Summary
Chapter 5. Homegrown asynchronous solution
5.1 Parallel processing
5.2 Asynchronous processing
5.3 Design
5.3.1 Prepare Data for Child
5.3.2 Initiate Child
5.3.3 Check for Completion
5.3.4 Retrieve Data from Child
5.3.5 Perform Housekeeping
5.4 Summary
Chapter 6. IBM CICS asynchronous solution
6.1 Design
6.1.1 Prepare Data for Child
6.1.2 Initiate Child
6.1.3 Check for Completion
6.1.4 Retrieve Data from Child
6.1.5 Perform Housekeeping
6.2 Migration
6.3 Summary
Chapter 7. Other implementation patterns
7.1 Unordered Responses
7.2 Updating remote hosts (High Latency)
7.3 Fire-and-Forget
7.4 Summary
Chapter 8. Considerations
8.1 Transactionality and recovery
8.2 Data integrity
8.3 Timeouts
8.4 CPU / Cost
8.4.1 Command overhead
8.4.2 Justification for additional processing
8.5 Resources
8.5.1 Threadsafe considerations
8.5.2 Managing MXT and TRANCLASS
8.6 Testing
8.6.1 Testing that uses a single REST client
8.6.2 Testing that uses multiple REST clients
8.7 Skills
8.8 Conclusion
Back cover
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Walmart and the CICS Asynchronous API: An Adoption Experience
Back cover
Acrobat bookmark
ISBN 0738457477
SG24-8444-00
®
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