Partition name registered in zk contains broker id and sequence(partition) id, such as "0-0", "0-1", ...
Thanks, Yonghui On 12-12-30 下午11:44, "王国栋" <wangg...@gmail.com> wrote: >Thanks Yonghui. > >But how does the new broker decide the partition id of the new topic? Or >each partion id contains a broker id and a sequence id? > > > > >On Fri, Dec 28, 2012 at 12:08 PM, 永辉 赵 <zhaoyong...@gmail.com> wrote: > >> Here is my understanding, but may be wrong. >> >> Every topic in one broker has num.partitions partitions if we only set >> num.partitions >> >> When a new broker is added, if there is topic data folder under >>kafka-logs >> folder, >> then the broker will register num.partitions of this topic in zk, else >>the >> broker doesn't know which topic should be registered. >> If no brokers register the topic(topic data folder is not existed in any >> broker), consumer will fall in bootstrap, assuming each broker has 1 >> partition. >> The broker will register num.partitions of this topic in zk, after it >> receive this topic message . >> >> If only a few brokers haven't register the topic in zk, I think these >> brokers may not actually work for this topic. >> >> Please correct me if I am wrong. >> >> Thanks, >> Yonghui >> >> >> >> >> >> On 12-12-28 上午10:30, "王国栋" <wangg...@gmail.com> wrote: >> >> >Hi , >> > >> >I am reading the design doc for Kafka. But I can not find the >>algorithm >> >which illustrates such scenario. When a new broker is registered in >> >zookeeper, how do all the brokers negotiates with all the others? How >>does >> >a new broker decide which partitions should be stored ? >> > >> >By the way, I find num.partitions in server configure, but I can not >>find >> >any parameter defining the topics of this broker. >> > >> >Could you tell me how to configure brokers in the following example. >>For >> >example, I want to set "broker1" to store "topic1" and "topic2", each >> >topic >> >has 3 partitions? >> >I think setting topic.partition.count.map as "topic1:3, topic2:3" >>should >> >works. Is there any simpler configuration? >> > >> > >> >Thanks. >> > >> >-- >> >Guodong Wang（王国栋） >> >Email:wangg...@gmail.com >> >> >> > > >-- >Guodong Wang >王国栋
