Allegro improved their Kafka produce tail latency by over 80% when they switched from ext4 to xfs. What I enjoyed most about this article is the detailed analysis and tweaking the team made to ext4 before considering switching to xfs. This is a classic case of how a good tech blog looks like in my opinion.

0:00 Intro
0:30 Summary
2:35 How Kafka Works?
5:00 Producers Writes are Slow
7:10 Tracing Kafka Protocol
12:00 Tracing Kernel System Calls
16:00 Journaled File Systems
21:00 Improving ext4
26:00 Switching to XFS

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