4. Session Replication

Added by gdamour, last edited by gdamour on Sep 02, 2007  (view change)

Session Replication On Completion of an Invocation
  • An invocation targeted at yellow is received by Node 1.
  • The invocation proceeds and, at its completion, yellow is replicated to Node 2 and Node 3. Node 2 and Node 3 are elected based on a pluggable replication strategy, which defines:
    • the number of replicas to be maintained for each session; and
    • the nodes which should host the replicas.

Session Replication On Cluster Membership Change
  • Node 3 leaves the cluster or fails.
  • Node 1 re-organizes the replicas of the sessions it manages, e.g. yellow.
  • Node 1 triggers a re-election of the nodes which should host the replicas of yellow.
  • The replication strategy decides to create a new replica of yellow on Node 4. The replica currently on Node 2 is untouched.
  • Node 1 replicates to Node 4 yellow.

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