Thanks for your kindly reply. From: Jun Rao [mailto:jun...@gmail.com] Sent: 2013年1月15日 13:53 To: dev@kafka.apache.org; Jun Guo -X (jungu - CIIC at Cisco) Subject: Re: About kafka 0.8 producer zookeeper-based load balancing on per-request basis
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<mailto: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
