Chapter 9. Data Sharing

  • Data Sharing Components

  • Maintaining Data Integrity

  • Migration

  • Workload Management

  • Sysplex Query Parallelism

  • Recovery Considerations

Data sharing, available in DB2 since Version 4, allows an application to run on one or more DB2 subsystems in a parallel sysplex environment. The applications can read and write to the same data concurrently. Prior to data sharing, DDF was used to access data on other subsystems, or used for other more creative means, such as replication between subsystems.

The subsystems that can share data must belong to a data sharing group. The subsystems in the group are known as members. Up to 32 members are allowed in a data sharing group. Only members in the group can share data and a member can belong ...

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