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Posted to common-user@hadoop.apache.org by John Lilley <jo...@redpoint.net> on 2013/11/13 15:22:58 UTC

FSDataInputStream: setReadAhead, setDropBehind

I'm assuming that these methods exist to improve performance of certain I/O patterns, but the API doc doesn't explain when one would use them.  Our software's I/O pattern is mostly sequential I/O in large buffers (e.g. 256k).  Would one set these differently for local block I/O vs remote block I/O?
Thanks
John