Have you looked at #4 in http://kafka.apache.org/faq.html ?
Thanks, Jun On Fri, Apr 26, 2013 at 8:19 AM, Oleg Ruchovets <oruchov...@gmail.com>wrote: > Hi. > I have simple kafka producer/consumer application. I have one producer > and 2 consumers. consumers has the same code , it is just executed it in > different threads. For some reason information produced by producer > consumed only by ONE CONSUMER.Second consumer didn't consumed any > information. May be I have to add additional configuration parameters? > > I need is the following: > 1)Producer produce one event. > 2)Two consumers and each consumer consumes the event one time. > > For example : > 1)Producer1 produces message Message1. > 2)Consumer1 consumes Message1. > 3)Consumer2 consumes Message1. > > What is the way to got such functionality? > > Thanks > Oleg. > > > On Sun, Apr 21, 2013 at 7:21 PM, Philip O'Toole <phi...@loggly.com> wrote: > > > OK, if you want each consumer to process the same data, then simply > > point each consumer at your Kafka cluster and have each Consumer > > consume all data. There is no synchronization required between those > > two consumers. > > > > In other words, what you want to do is fine. Please read the Kafka > > design doc if you have not done so: > > > > http://kafka.apache.org/design.html > > > > Philip > > > > On Sun, Apr 21, 2013 at 9:16 AM, Oleg Ruchovets <oruchov...@gmail.com> > > wrote: > > > I am on POC stage , so I can configure the producer to write in > different > > > partitions. > > > But how it will help me to process the same data with two consumers. > > > > > > I try to get such effect: > > > I got the data and store it to Kafka. > > > > > > I have 2 consumers: > > > 1) for real time which consumes the data for example every 10 > seconds. > > > 2) for move data to hdfs - for example every 1 hour. > > > > > > But in case I'll use 2 partitions , each consumer process part of the > > data > > > (50%). Does it correct? > > > I need that 2 consumers will produce 100% of the data. > > > > > > Please advice. > > > > > > > > > On Sun, Apr 21, 2013 at 12:00 PM, Philip O'Toole <phi...@loggly.com> > > wrote: > > > > > >> On Sun, Apr 21, 2013 at 8:53 AM, Oleg Ruchovets <oruchov...@gmail.com > > > > >> wrote: > > >> > Hi Philip. > > >> > Does it mean to store the same data twice - each time to > different > > >> > partition? I tried to save data only one time. Using two partitions > > means > > >> > to store data twice? > > >> > > >> No, I mean spreading the data across the two partitions, so 50% goes > > >> in one, and 50% goes in the other. Have your Producer always write to > > >> partition "-1", which will tell Kafka to select a partition at random > > >> for each message. > > >> > > >> Then one of the Consumers will consume partition 0, the other > partition > > 1. > > >> > > >> > By the way I am using kafka 0.7.2. > > >> > > > >> > Thanks > > >> > Oleg. > > >> > > > >> > > > >> > On Sun, Apr 21, 2013 at 11:30 AM, Philip O'Toole <phi...@loggly.com > > > > >> wrote: > > >> > > > >> >> Read the design doc on the Kafka site. > > >> >> > > >> >> The short answer is to use two partitions for your topic. > > >> >> > > >> >> Philip > > >> >> > > >> >> On Apr 21, 2013, at 12:37 AM, Oleg Ruchovets <oruchov...@gmail.com > > > > >> wrote: > > >> >> > > >> >> > Hi, > > >> >> > I have one producer for kafka and have 2 consumers. > > >> >> > I want to consume produced events to hdfs and storm. Copy to > hdfs I > > >> will > > >> >> do > > >> >> > every hour but to storm every 10 seconds. > > >> >> > > > >> >> > Question: Is it supported by kafka? Where can I read how to > > organize 1 > > >> >> > producer and 2 consumers? > > >> >> > > > >> >> > Thanks > > >> >> > Oleg. > > >> >> > > >> > > >
