== sanity test 101b: check stride-io mode read-ahead =========================================================================== 05:15:21 (1773220521)
striped dir -i1 -c2 -H all_char /mnt/lustre/d101b.sanity

1.697932s, 4.94049MB/s
Read-ahead success for size 8192

1.471862s, 5.69932MB/s
Read-ahead success for size 16384

2.284302s, 3.67229MB/s
Read-ahead success for size 32768

2.523107s, 3.32471MB/s
Read-ahead success for size 65536

1.998133s, 4.19822MB/s
Read-ahead success for size 131072

1.116247s, 7.51501MB/s
Read-ahead success for size 262144

1.435968s, 5.84178MB/s
Read-ahead success for size 524288

1.622547s, 5.17002MB/s
Read-ahead success for size 1048576