== sanity test 101b: check stride-io mode read-ahead =========================================================================== 06:52:29 (1787827949)
striped dir -i1 -c2 -H all_char  /mnt/lustre/d101b.sanity

1.635346s, 5.12956MB/s
Read-ahead success for size 8192

1.715841s, 4.88892MB/s
Read-ahead success for size 16384

2.240847s, 3.7435MB/s
Read-ahead success for size 32768

1.933008s, 4.33967MB/s
Read-ahead success for size 65536

1.093183s, 7.67356MB/s
Read-ahead success for size 131072

1.435662s, 5.84302MB/s
Read-ahead success for size 262144

1.215865s, 6.89929MB/s
Read-ahead success for size 524288

1.316681s, 6.37103MB/s
Read-ahead success for size 1048576