== sanity test 101b: check stride-io mode read-ahead =========================================================================== 14:26:15 (1788200775)
striped dir -i1 -c2 -H crush  /mnt/lustre/d101b.sanity

1.602767s, 5.23383MB/s
Read-ahead success for size 8192

1.380694s, 6.07565MB/s
Read-ahead success for size 16384

1.989178s, 4.21712MB/s
Read-ahead success for size 32768

1.537232s, 5.45696MB/s
Read-ahead success for size 65536

1.589101s, 5.27884MB/s
Read-ahead success for size 131072

1.531275s, 5.47819MB/s
Read-ahead success for size 262144

1.243897s, 6.74381MB/s
Read-ahead success for size 524288

1.109478s, 7.56086MB/s
Read-ahead success for size 1048576