10. NIMBUS / NODES
RobustKill / Restart easy
11. No data loss
Message transforms into a tuple tree
Storm tracks tuple tree
Fully processed when tree exhausted
Task died – failed tuples replayed
Acker task died – related tuples
timeout and are replayed
Spout task died – source replays, e.g.
pending messages are placed back on
14. WHAT DO I HAVE TO DO?
Inform about new links in tree
Inform when finished with a tuple
Every tuple must be acked or failed