In 0.8, when a topic is created, we decide how each replica of a partition is mapped to a broker. In general, we try to spread the replicas across all brokers.
Thanks, Jun On Sun, Jan 27, 2013 at 12:40 PM, S Ahmed <sahmed1...@gmail.com> wrote: > So from what I understand, a single broker will contain all the messages > for a given topic (and its partitions). Who decides which broker will own > a particular topic? > > > On Sun, Jan 27, 2013 at 3:36 PM, Neha Narkhede <neha.narkh...@gmail.com > >wrote: > > > In Kafka 0.7, topics and partitions are dynamic in the sense that a > > partition is created when the broker receives the first message for that > > partition. > > In Kafka 0.8, there are 2 ways of creating a new topic - > > 1. Turn on auto.create.topics.enable option on the broker. When the > broker > > receives the first message for a new topic, it creates that topic with > > num.partitions and default.replication.factor. > > 2. Use the admin command bin/kafka-create-topic.sh > > > > Thanks, > > Neha > > > > > > On Sun, Jan 27, 2013 at 12:23 PM, S Ahmed <sahmed1...@gmail.com> wrote: > > > > > I'm looking at the kafka server.properties that is in /config folder > and > > > didn't find any reference to topics or partitions. > > > > > > Are topics and optionally partitions dynamic in nature or do they have > to > > > be defined before starting the broker? (and consequently producers > can't > > > send to a topic and partition that isn't predefined). > > > > > >
