== sanity test 101b: check stride-io mode read-ahead =========================================================================== 07:31:09 (1787743869)
striped dir -i1 -c2 -H all_char  /mnt/lustre/d101b.sanity

1.693073s, 4.95466MB/s
Read-ahead success for size 8192

1.534948s, 5.46508MB/s
Read-ahead success for size 16384

1.801449s, 4.65659MB/s
Read-ahead success for size 32768

1.810019s, 4.63454MB/s
Read-ahead success for size 65536

1.549145s, 5.41499MB/s
Read-ahead success for size 131072

1.390328s, 6.03355MB/s
Read-ahead success for size 262144

1.143187s, 7.33791MB/s
Read-ahead success for size 524288

1.292114s, 6.49216MB/s
Read-ahead success for size 1048576