== sanity test 101b: check stride-io mode read-ahead =========================================================================== 07:04:21 (1787396661)
striped dir -i1 -c2 -H crush  /mnt/lustre/d101b.sanity

1.655896s, 5.0659MB/s
Read-ahead success for size 8192

1.784500s, 4.70082MB/s
Read-ahead success for size 16384

1.886956s, 4.44558MB/s
Read-ahead success for size 32768

1.783927s, 4.70233MB/s
Read-ahead success for size 65536

1.487247s, 5.64036MB/s
Read-ahead success for size 131072

1.477994s, 5.67567MB/s
Read-ahead success for size 262144

1.245080s, 6.7374MB/s
Read-ahead success for size 524288

1.138014s, 7.37127MB/s
Read-ahead success for size 1048576