I wrote a KIP for this after some discussion on KAFKA-1646. https://issues.apache.org/jira/browse/KAFKA-1646 https://cwiki.apache.org/confluence/display/KAFKA/KIP-20+-+Enable+log+preallocate+to+improve+consume+performance+under+windows+and+some+old+Linux+file+system The RB is here: https://reviews.apache.org/r/33204/diff/
Thanks, Honghai
