== sanity test 101b: check stride-io mode read-ahead =========================================================================== 08:26:50 (1786192010)
striped dir -i1 -c2 -H crush2  /mnt/lustre/d101b.sanity

0.691872s, 12.1245MB/s
Read-ahead success for size 8192

0.739710s, 11.3404MB/s
Read-ahead success for size 16384

0.799225s, 10.4959MB/s
Read-ahead success for size 32768

0.813689s, 10.3094MB/s
Read-ahead success for size 65536

0.691713s, 12.1273MB/s
Read-ahead success for size 131072

0.664237s, 12.6289MB/s
Read-ahead success for size 262144

0.576679s, 14.5464MB/s
Read-ahead success for size 524288

0.626967s, 13.3797MB/s
Read-ahead success for size 1048576