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E.3.3. Crossing Compatibility Boundaries

Rolling upgrades that cross compatibility boundaries must be preformed in multiple steps. For example, to perform a rolling update from Heartbeat 2.0.1 to Pacemaker 0.6.6 one must:
  1. Perform a rolling upgrade from Heartbeat 2.0.1 to Heartbeat 2.0.4
  2. Perform a rolling upgrade from Heartbeat 2.0.4 to Heartbeat 2.1.3
  3. Perform a rolling upgrade from Heartbeat 2.1.3 to Pacemaker 0.6.6