== sanity test 101b: check stride-io mode read-ahead =========================================================================== 05:20:51 (1779096051)
striped dir -i1 -c2 -H all_char  /mnt/lustre/d101b.sanity

1.830217s, 4.5834MB/s
Read-ahead success for size 8192

1.635581s, 5.12882MB/s
Read-ahead success for size 16384

1.841990s, 4.5541MB/s
Read-ahead success for size 32768

1.699443s, 4.93609MB/s
Read-ahead success for size 65536

1.356554s, 6.18376MB/s
Read-ahead success for size 131072

1.294869s, 6.47834MB/s
Read-ahead success for size 262144

1.354890s, 6.19136MB/s
Read-ahead success for size 524288

1.370395s, 6.12131MB/s
Read-ahead success for size 1048576