== sanity test 101b: check stride-io mode read-ahead =========================================================================== 08:53:59 (1788872039)
striped dir -i1 -c2 -H crush  /mnt/lustre/d101b.sanity

1.643524s, 5.10404MB/s
Read-ahead success for size 8192

1.650045s, 5.08387MB/s
Read-ahead success for size 16384

2.062852s, 4.06651MB/s
Read-ahead success for size 32768

1.718034s, 4.88268MB/s
Read-ahead success for size 65536

1.728341s, 4.85356MB/s
Read-ahead success for size 131072

1.746549s, 4.80296MB/s
Read-ahead success for size 262144

1.596118s, 5.25563MB/s
Read-ahead success for size 524288

1.496686s, 5.60479MB/s
Read-ahead success for size 1048576