== sanity test 101b: check stride-io mode read-ahead =========================================================================== 00:07:43 (1781237263)
striped dir -i1 -c2 -H all_char  /mnt/lustre/d101b.sanity

1.362741s, 6.15569MB/s
Read-ahead success for size 8192

1.392368s, 6.02471MB/s
Read-ahead success for size 16384

1.497477s, 5.60183MB/s
Read-ahead success for size 32768

1.564464s, 5.36197MB/s
Read-ahead success for size 65536

1.496830s, 5.60425MB/s
Read-ahead success for size 131072

1.696033s, 4.94602MB/s
Read-ahead success for size 262144

1.206580s, 6.95238MB/s
Read-ahead success for size 524288

1.055534s, 7.94726MB/s
Read-ahead success for size 1048576