Wanted to check if there is any known limit on the # of topics in a Kafka cluster? I wanted to design a system which has say 5k topics and multi-threaded consumers reading messages from these topics. Does anyone have experience with such large topic size? I see in Kafka's page a test for throughput w.r.t. to topic size, but the max topic size is 50.
We've seen big performace degradation when we tested 1024 topics, so we've opted to go for a much smaller topic count (< 100).
On the read side, I think performance is largely driven by the ability of the operating system to effectively cache access to #partitions*topic files. Clearly if you divide your available memory by 1024 topics you'll have less in the file cache per topic than you would with only 3 topics (for example). On Wed, Mar 27, 2013 at 11:14 AM, Jun Rao <[EMAIL PROTECTED]> wrote: Matthew Rathbone Foursquare | Software Engineer | Server Engineering Team [EMAIL PROTECTED] | @rathboma <http://twitter.com/rathboma> | 4sq<http://foursquare.com/rathboma>
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