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WebLogic Educational Consultancy SYS-ED SYSED Computer Education Techniques

CICS Transaction Server and IBM MQ

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Knowledge Transfer

CICS Transaction Server Schedule

Definition of Service

Delivery Medium

WebSphere MQ Schedule

     

CICS Transaction Server and IBM MQ

Reliable Message Queuing

Operational Challenge Client Requirements - CICS Transaction Server and IBM MQ Training Qualifying Client-specific Subject Matter
Case Studies and Workshops Guidelines and Best Practices - CICS Transaction Server Guidelines and Best Practices - IBM MQ
Copyright Acknowledgement
 

Operational Challenge

Organizational enterprise is challenged to integrate back-end legacy systems with newer client/server and web-based systems and deliver reliable message queuing between applications. IBM MQ (WebSphere MQ) is the industry leading software used for moving data between applications and different systems: SOA: service oriented architecture, web servicization, distributed processing, platform and application migration, mobile computing, and cloud computing.

There is considerable complexity associated with the efficient and reliable movement of data. An accurate modeling and specification of the business logic, structure of the data, and processing throughput will be required for cost effective repurposing of existing software assets and establishing a framework for long term maintainability are the primary goals.


Client Requirements - CICS Transaction Server and IBM MQ Training

The client organization requires CICS Transaction Server and IBM MQ topics for its information technology staff. The subject matter is not included in any single search engine course. Some of the topics are from the CICS TS: Command Level Programming - Advanced course. Overview topics from the CICS Transaction Server: Application Design can be incorporated into the specialized course.

Subject matter and examples from the IBM MQ (WebSphere MQ): Application Design course also will be included. The trigger topic in the IBM MQ Application Programming course will be taught inclusive of examples specific to the client installation. DB2 and MQ features will need to be incorporated into the courseware and sample programs.


Qualifying Client-specific Subject Matter

These topics will need to be presented.

1. Use of channels and containers as an alternative to COMMAREA.

2. Temporary storage control. 3. Transient data control.
4. Interval control. 5. File Browse commands. 6. VSAM alternate index processing.
7. CICS web support. 8. Developing and implementing online provider and requester applications as web services. 9. Security mechanisms for web services applications.

 

1. Use of MQ Explorer to detect potential problems in system resources.

2. Triggering with and without passing data to the triggered transaction and utilization of the trigger message header. 3. Message grouping.
4. Distribution lists. 5. Unit of work coordination. 6. Trigger on first, on every, and on depth.
7. Setting up the process for a trigger monitor. 8. Create an initiation queue. 9. Parsing the trigger message.
10. Design and employ workload management.    


These additional areas need to be qualified:

  • Is the entire message processing under z/OS or are messages being retrieved from other platforms?

  • Are the applications coded in COBOL, Java, or both?

  • What is being used for application development: IBM MQ classes or JMS?

  • Is there client documentation and guidelines for using IBM MQ?


Case Studies and Workshops

These exercises will be conducted:

  • Upgrading CICS Transaction Server for z/OS to allow broader access to legacy mainframe applications through web services.
  • How to efficiently utilize 64-bit storage for channels and containers.
  • The improvements to the Enterprise Workload Manager for CICS.
  • Enabling connections between CICS and the WebSphere MQ product.
  • Implementing the IBM MQ CICS Adapter.
  • Implementing and utilizing the CICS Bridge.
  • Enabling CICS support for the HTTP and WebSphere MQ transport protocols.
  • Using CICS to parse XML using IBM z/OS XML System Services.
Vendor documentation and third party content is interpreted and incorporated selectively into our courseware and training aids.


Guidelines and Best Practices

The instructor will teach and demonstrate guidelines specific to the client environment.

CICS Transaction Server

  • How to analyze throughput rate and workload response times.
  • Using the CICS Transaction Gateway ping utility to examine network connectivity and analyze response time.
  • Design channels which take take advantage of the improvements in using containers for passing data; it can be used in place of COMMAREAs.
  • Upgrading the CICS Transaction Server for z/OS to allow more comprehensive access to legacy mainframe applications through web services.
  • Utilize 64-bit storage for channels and storage.

 

IBM MQ

  • Shared queues are limited by the application list structure size.
    • Determine the maximum depth expected during peak periods, the size of the messages, and the projected duration on the queue.
    • This information then can be used in specifying an efficient structure size.
  • Examine the SMF: System Management Facility queue accounting records - SMF116 for determining the message volumes and rates.
    • The size of the queue should be a low number.
    • The important factor is not how many messages pass through a queue, but the size of the queue.
  • Data serialization needs to be examined.
    • If the messages must be processed in a required sequence, then there can be only one putting and one getting application.
    • This will require queues to be sized for holding a larger number of messages.
    • However, the requirement that messages be processed sequentially will not always apply.
  • Some serialization requirements are driven by affinities between individual messages.
    • Messages are logically associated:
      1- When multiple messages make up an application transaction.
      2- When an initial order has been accepted a change or a cancellation can be processed and ordered based on type.
  • Use one backout queue per application, not per queue.

  • Do not use the queue-manager-defined dead letter queue as the backout queue.
    • The content of the backout queue usually is driven by the application.
 

Copyright Acknowledgement

CICS Transaction Server and IBM MQ are registered trademarks of IBM Corporation.