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The "HedWig/TopicManagement" page has been changed by ErwinTam. http://wiki.apache.org/hadoop/HedWig/TopicManagement?action=diff&rev1=5&rev2=6 -------------------------------------------------- * If the ephemeral node creation succeeds, then H1 will set up its internal bookkeeping to begin delivering messages to C. * Otherwise (ephemeral node creation fails) then H1 will read the hostname (e.g. H3) of the hub assigned to the topic from the '''T.Hub''' node, and return to the client a ''redirect'' message, requesting that the client retry its subscription at H3. + ==== Notes: ==== - - Notes: * Because we want subscribers to be directly connected to the hub responsible for the topic, we will redirect the client to that hub. * Because the '''T.Hub''' node is ephemeral, it must be created by the hub that owns the topic, not by any other hub. * To decide which hub to assign a topic to, the deciding hub should use the current list of alive nodes from '''Hedwig.Hubs''' in ZooKeeper.
