Does your case requires analyzing connection graphs? I think you just need to make sure that a producer would connect to as few brokers as possible, and to achieve this you just needs to know the partition assignment map, which exist on any broker's metadata cache.
Guozhang On Thu, May 29, 2014 at 12:18 PM, Рябков Алексей Николаевич < a.ryab...@ntc-vulkan.ru> wrote: > > Well may be yes and may no.... > I think that in design we must point out that co-ordinator also must > analize connection graph and must map consumers to broker with minimal > network overhead... > > -----Исходное сообщение----- > От: Guozhang Wang [mailto:wangg...@gmail.com] > Отправлено: Thursday, May 29, 2014 9:02 PM > Кому: users@kafka.apache.org > Тема: Re: how to control assign policy for consumers > > In the new consumer design the partitioning algorithm can be customized by > the user: > > > https://cwiki.apache.org/confluence/display/KAFKA/Kafka+0.9+Consumer+Rewrite+Design > > Would that fit your use case? > > Guozhang > > > On Thu, May 29, 2014 at 8:59 AM, Рябков Алексей Николаевич < > a.ryab...@ntc-vulkan.ru> wrote: > > > May be right place to add such optimization within > > https://cwiki.apache.org/confluence/display/KAFKA/Hierarchical+Topics ? > > > > -----Исходное сообщение----- > > От: Guozhang Wang [mailto:wangg...@gmail.com] > > Отправлено: Wednesday, May 28, 2014 8:57 PM > > Кому: users@kafka.apache.org > > Тема: Re: how to control assign policy for consumers > > > > With high-level consumers you cannot control the assignment of > > partitions to consumers, and if partitions are located across all > > brokers each consumer is likely to connect to each of the brokers. > > > > One (little hacky) thing you can do is to manually assign the > > partitions to brokers such that each broker i of topic t is in broker > > i % 3, the for consumer fetching partition i of topic t, it will only > > connect to broker i % 3. By default the assignment is not aligned > > hence you will likely to have TCP between each pair of consumer/broker. > > > > Guozhang > > > > > > On Wed, May 28, 2014 at 8:15 AM, Рябков Алексей Николаевич < > > a.ryab...@ntc-vulkan.ru> wrote: > > > > > How can I tell consumer to connect to one broker ...For example: > > > - I have 3 topic and 3 broker...also each topic have 6 partitions... > > > - I than start 6 consumers to listen this 3 topics...And in such > > > case we can found from 6 (each consumer connect only to one broker) > > > to > > > 18 (each consumer connect to every broker) TCP connection .... How I > > > can minimize network connections? > > > > > > With best regards, Aleksey Ryabkov > > > > > > > > > > > > -- > > -- Guozhang > > > > > > -- > -- Guozhang > -- -- Guozhang
