Hi, I want to know I/O Performance of my Hadoop Cluster. Because of that I ran test.jar, hier is my Results;
----- TestDFSIO ----- : write Date & time: Mon May 02 14:38:29 CEST 2011 Number of files: 10 Total MBytes processed: 10000 Throughput mb/sec: 12.809033955468113 Average IO rate mb/sec: 13.16771411895752 IO rate std deviation: 2.059995952372142 Test exec time sec: 964.4 ----- TestDFSIO ----- : read Date & time: Mon May 02 15:00:10 CEST 2011 Number of files: 10 Total MBytes processed: 10000 Throughput mb/sec: 12.938200684430816 Average IO rate mb/sec: 14.908231735229492 IO rate std deviation: 4.231364683566859 Test exec time sec: 941.601 read-speed and write-speed almost same!!! Why can't I read faster? thanks, Baran
