Harsh,   In this thread you stated "but do look into if your users have begun creating too many tiny files as it may hamper their job performance with overheads of too many blocks (and thereby, too many mappers)." Too may tiny files is in the eye of the  beholder if those files are what get you paid.  I'm also seeing a block issue on wo of our nodes, but a rebalance to 10% has no effect. I've rebalanced to 8% and it improves, but I suspect we're running into a small files issue.  ... View more