== sanity test 101b: check stride-io mode read-ahead =========================================================================== 11:35:18 (1785080118)
striped dir -i1 -c2 -H crush2  /mnt/lustre/d101b.sanity

1.779684s, 4.71354MB/s
Read-ahead success for size 8192

1.761227s, 4.76293MB/s
Read-ahead success for size 16384

2.518589s, 3.33068MB/s
Read-ahead success for size 32768

1.983374s, 4.22946MB/s
Read-ahead success for size 65536

1.395031s, 6.01321MB/s
Read-ahead success for size 131072

1.729358s, 4.85071MB/s
Read-ahead success for size 262144

1.507118s, 5.56599MB/s
Read-ahead success for size 524288

1.167676s, 7.18402MB/s
Read-ahead success for size 1048576