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add dispatch, route images

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Feng 2016-04-02 14:40:54 +08:00
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commit d75d3719e1
3 changed files with 5 additions and 1 deletions
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docs/source/design.rst
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@ -177,7 +177,11 @@ For example, if node1 subscribed 't/+/x' and 't/+/y', node2 subscribed 't/#' and
| t/a -> node3 |
-------------------------
The routing layer would route MQTT messages between clustered nodes by topic trie match and routing table lookup, and follow the rules below:
The routing layer would route MQTT messages between clustered nodes by topic trie match and routing table lookup:
.. image:: _static/images/route.png
The routing design follows the two rules:
1. A message only gets forwarded to other cluster nodes if a cluster node is interested in it. This reduces the network traffic tremendously, because it prevents nodes from forwarding unnecessary messages.