== sanity test 101b: check stride-io mode read-ahead =========================================================================== 14:28:03 (1789324083)
striped dir -i1 -c2 -H crush2  /mnt/lustre/d101b.sanity

0.619502s, 13.5409MB/s
Read-ahead success for size 8192

0.686593s, 12.2177MB/s
Read-ahead success for size 16384

0.849960s, 9.86942MB/s
Read-ahead success for size 32768

0.635580s, 13.1984MB/s
Read-ahead success for size 65536

0.577866s, 14.5165MB/s
Read-ahead success for size 131072

0.525168s, 15.9732MB/s
Read-ahead success for size 262144

0.458356s, 18.3015MB/s
Read-ahead success for size 524288

0.519601s, 16.1443MB/s
Read-ahead success for size 1048576