Dear all, I have several questions during my learning of Storm implementation and architecture. Although I read http://storm.incubator.apache.org/documentation/Home.html carefully, but I still cannot get the answer, I am writing this email to ask your help, and any comments are very appreciated.
1. Nimbus is singleton in a storm cluster? I think it’s single in the storm.yaml confiugration file. As if it support more than 1, it should be configured there. If so, why Nimbus not set to be more than 1 to let the ZK manages the leader selection of the Nimbus, then the nimbus is HA and not SPOF? If nimbus died, who will take resposibility for restarting it? 2. The success handling of the tuple will be updated to the task by acker. And the design for acker is so so so excellence. My question is by how the acker will detect the failure of the Tuple handler? Only by when ack val not == 0 when timeout? 3. If the acker reports the failure to the Spout task, how the Spout task restart emit the tuple? Will it choose some other worker? As if it emits the tuple to the same call stack, it may fail at the same place. 4. If a worker exits, who will take resposibility for restarting the worker? 5. What’s the duty for Supoervisor? Just for starting the defined number of worker? Thank you in advance! Best Regards Anzhan Zhang 张安站 Baidu PS Ext： 3153 Hi: anzhsoft Cubicle：F4-B180
