== sanity test 101b: check stride-io mode read-ahead =========================================================================== 07:05:34 (1786532734)
striped dir -i1 -c2 -H all_char  /mnt/lustre/d101b.sanity

0.750047s, 11.1841MB/s
Read-ahead success for size 8192

0.785743s, 10.676MB/s
Read-ahead success for size 16384

0.870947s, 9.63159MB/s
Read-ahead success for size 32768

0.775081s, 10.8229MB/s
Read-ahead success for size 65536

0.713882s, 11.7507MB/s
Read-ahead success for size 131072

0.725949s, 11.5554MB/s
Read-ahead success for size 262144

0.697202s, 12.0318MB/s
Read-ahead success for size 524288

0.612114s, 13.7043MB/s
Read-ahead success for size 1048576