== sanity test 101b: check stride-io mode read-ahead =========================================================================== 02:04:04 (1769756644)
striped dir -i1 -c2 -H crush /mnt/lustre/d101b.sanity

2.465917s, 3.40182MB/s
Read-ahead success for size 8192

1.795528s, 4.67194MB/s
Read-ahead success for size 16384

1.659124s, 5.05605MB/s
Read-ahead success for size 32768

2.343646s, 3.5793MB/s
Read-ahead success for size 65536

1.691641s, 4.95886MB/s
Read-ahead success for size 131072

1.751808s, 4.78854MB/s
Read-ahead success for size 262144

1.189056s, 7.05485MB/s
Read-ahead success for size 524288

1.629842s, 5.14688MB/s
Read-ahead success for size 1048576