This course introduces the concepts, components and considerations involved when using Db2 for z/OS data sharing. It explains the reasons for using data sharing, and explores the implementation considerations such as Coupling Facility structures, data integrity and the operational and performance issues that need to be addressed when considering Db2 data sharing.

This course is also available for one-company, on-site presentations and for live presentation over the Internet, via the Virtual Classroom Environment service.

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Attendees will need a good understanding of Db2. A basic understanding of parallel sysplex and the Coupling Facility would be beneficial, this can be obtained by attending the course Parallel Sysplex Concepts & Facilities.

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Delegates will learn how to

  • describe the concepts of Db2 data sharing and its uses
  • describe the need for the Coupling Facility structures used by Db2 data sharing
  • explain how Db2 uses the Coupling Facility structures:
    Group buffer pools
    Global locking structure
    Shared Communication Area (SCA)
  • understand how data sharing is implemented and controlled
  • identify monitoring and performance issues for a Db2 data sharing environment.
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Data Sharing Overview

Parallel sysplex; the Coupling Facility; Db2 data sharing concepts; reasons for data sharing; data integrity issues; Coupling Facility structures.

Data Integrity & Consistency

Group buffer pools; GBP processing; GBP parameters; lock structure; controlling global locking; real and false lock contention; lock negotiation; shared communications area.

Implementing Data Sharing

Enabling data sharing; adding additional members to data sharing group; merging data.

Operational Considerations

Commands; Db2 member failure; retained locks; Coupling Facility failure; duplexing group buffer pools; recovery considerations; using and monitoring data sharing environments; performance considerations.

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