[manigandham]

Millions of separate topics on a single Kafka cluster? The way it's designed requires opening files for all of those topics and their partitions so good luck if you're trying that. You'll run out of file handles, then memory, and then the disk access will completely freeze up.

[otterley]

I didn't think we were speaking of millions of topics here; only millions of logs. You can certainly have logs numbering in the millions using a single topic. Mux/demux would have to happen at the producer/consumer side, of course.

[manigandham]

Do you mean log segments then? In that case I don't see what's special about it because that's just rolling files and all of these systems can handle millions that way.

As far as millions of topics, if you have to do it at a logical layer yourself, then you might as well use a system that supports it natively.

[rakoo]

The logs in LogDevice also have an independent lifecycle, which your solution doesn't allow.

[sh00s]

A log in LogDevice is roughly equivalent to a Kafka partition.