A Demonstration On Data Affinity Within a Coherence Cluster
(Doc ID 1052174.1)
Last updated on JANUARY 30, 2022
Oracle Coherence - Version 3.3.0 to 3.7.1 Information in this document applies to any platform.
Data affinity describes the concept of ensuring that a group of related cache entries is contained within a single cache partition. This ensures that all relevant data is managed on a single primary cache node (without compromising fault-tolerance). In this demo we will use the username schema DEPT/EMP tables showing how we set up Data Affinity in Coherence using a relationship as follows:
(Dept -> Emp)
A number of standard Coherence operations can benefit from affinity, including cache queries, InvocableMap operations, and the getAll/putAll/removeAll methods.
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