== sanity test 101b: check stride-io mode read-ahead =========================================================================== 05:07:00 (1779700020)
striped dir -i1 -c2 -H all_char  /mnt/lustre/d101b.sanity

1.615372s, 5.19299MB/s
Read-ahead success for size 8192

1.734906s, 4.83519MB/s
Read-ahead success for size 16384

1.854924s, 4.52235MB/s
Read-ahead success for size 32768

1.593221s, 5.26519MB/s
Read-ahead success for size 65536

1.747877s, 4.79931MB/s
Read-ahead success for size 131072

1.717767s, 4.88344MB/s
Read-ahead success for size 262144

1.269612s, 6.60722MB/s
Read-ahead success for size 524288

1.192223s, 7.03611MB/s
Read-ahead success for size 1048576