Basically, we spread partitions among multiple brokers. If a message is sent without a key, the producer picks a random partition to balance the load. If a message has a key, the default partitioner hashes the key to one of the partitions deterministically. Then, the load may not always be balanced.
Thanks, Jun On Mon, Jan 14, 2013 at 9:35 PM, Jun Guo -X (jungu - CIIC at Cisco) < ju...@cisco.com> wrote: > Hi, > We know, in kafka 0.8, producer connect to broker directly, it without > connecting to zookeeper. Than how it achieve zookeeper-based load balance > on per-request basis? > Actually, when a topic be created, its partition will distributed in one > or more brokers. When a message be sent, it will be delivered to a certain > partition according to its key word. That is to say ,a certain must be sent > to a fixed partition on a fixed broker. How the so called load balancing > works? > > Best Regards >
