On Tue, May 13, 2025, at 19:34, Jun Rao wrote: > > JR4. "Balance traffic among brokers and eliminate broker hotspots with > per-client granularity". Does that mean all traffic from a client is served > from a single broker? This seems to reduce the scalability from the client > perspective.
We propose that all diskless traffic from a client is served by a single broker at a point in time (i.e. it's not a strict link, it can be changed on subsequent requests). By client, we mean “producer”, “consumer”, or “admin client”, i.e. a logical entity, not a service instance. Provided that one single client rarely puts outstanding load on all or many topics, with multiple clients in the cluster this will even out. However, the mechanism of leaderless topics is universal enough to serve any balancing policy. This will be managed by the broker side (as proposed by KIP-1181), the error cost will be small and allow us to correct the course if necessary. Best, Ivan > > On Wed, Apr 16, 2025 at 5:00 AM Josep Prat <josep.p...@aiven.io.invalid> > wrote: > > > Hi Kafka Devs! > > > > We want to start a new KIP discussion about introducing a new type of > > topics that would make use of Object Storage as the primary source of > > storage. However, as this KIP is big we decided to split it into multiple > > related KIPs. > > We have the motivational KIP-1150 ( > > > > https://cwiki.apache.org/confluence/display/KAFKA/KIP-1150%3A+Diskless+Topics > > ) > > that aims to discuss if Apache Kafka should aim to have this type of > > feature at all. This KIP doesn't go onto details on how to implement it. > > This follows the same approach used when we discussed KRaft. > > > > But as we know that it is sometimes really hard to discuss on that meta > > level, we also created several sub-kips (linked in KIP-1150) that offer an > > implementation of this feature. > > > > We kindly ask you to use the proper DISCUSS threads for each type of > > concern and keep this one to discuss whether Apache Kafka wants to have > > this feature or not. > > > > Thanks in advance on behalf of all the authors of this KIP. > > > > ------------------ > > Josep Prat > > Open Source Engineering Director, Aiven > > josep.p...@aiven.io | +491715557497 | aiven.io > > Aiven Deutschland GmbH > > Alexanderufer 3-7, 10117 Berlin > > Geschäftsführer: Oskari Saarenmaa, Hannu Valtonen, > > Anna Richardson, Kenneth Chen > > Amtsgericht Charlottenburg, HRB 209739 B > > >
