== sanity test 101b: check stride-io mode read-ahead =========================================================================== 00:30:52 (1786077052)
striped dir -i1 -c2 -H fnv_1a_64  /mnt/lustre/d101b.sanity

1.646208s, 5.09572MB/s
Read-ahead success for size 8192

2.416788s, 3.47097MB/s
Read-ahead success for size 16384

2.958815s, 2.83512MB/s
Read-ahead success for size 32768

2.084648s, 4.02399MB/s
Read-ahead success for size 65536

1.471806s, 5.69953MB/s
Read-ahead success for size 131072

2.089303s, 4.01503MB/s
Read-ahead success for size 262144

1.564527s, 5.36175MB/s
Read-ahead success for size 524288

1.352816s, 6.20085MB/s
Read-ahead success for size 1048576