== sanity test 101b: check stride-io mode read-ahead =========================================================================== 01:05:27 (1788930327)
striped dir -i1 -c2 -H crush  /mnt/lustre/d101b.sanity

2.521672s, 3.32661MB/s
Read-ahead success for size 8192

2.035082s, 4.122MB/s
Read-ahead success for size 16384

2.767737s, 3.03085MB/s
Read-ahead success for size 32768

1.888484s, 4.44198MB/s
Read-ahead success for size 65536

1.794145s, 4.67555MB/s
Read-ahead success for size 131072

1.832722s, 4.57713MB/s
Read-ahead success for size 262144

1.527502s, 5.49172MB/s
Read-ahead success for size 524288

1.742247s, 4.81482MB/s
Read-ahead success for size 1048576