== sanity test 101b: check stride-io mode read-ahead =========================================================================== 07:56:16 (1787745376)
striped dir -i1 -c2 -H crush  /mnt/lustre/d101b.sanity

2.082718s, 4.02772MB/s
Read-ahead success for size 8192

1.943516s, 4.3162MB/s
Read-ahead success for size 16384

2.196725s, 3.81869MB/s
Read-ahead success for size 32768

2.202219s, 3.80916MB/s
Read-ahead success for size 65536

1.587265s, 5.28494MB/s
Read-ahead success for size 131072

1.609874s, 5.21072MB/s
Read-ahead success for size 262144

1.566828s, 5.35388MB/s
Read-ahead success for size 524288

1.038985s, 8.07385MB/s
Read-ahead success for size 1048576