Chapter 3. The Grouping API

Normally, Red Hat JBoss Data Grid uses the hash of a specific key to determine an entry's destination node. However, when the Grouping API is used, a hash of the group associated with the key is used instead of the hash of the key to determine the destination node.

Each node can use an algorithm to determine the owner of each key. This removes the need to pass metadata (and metadata updates) about the location of entries between nodes. This approach is beneficial because:

When using the Grouping API, each node must be able to calculate the owner of an entry. As a result, the group cannot be specified manually and must be either: