== sanity test 101b: check stride-io mode read-ahead =========================================================================== 12:31:50 (1772472710)
striped dir -i1 -c2 -H crush /mnt/lustre/d101b.sanity

1.926099s, 4.35523MB/s
Read-ahead success for size 8192

1.595651s, 5.25717MB/s
Read-ahead success for size 16384

2.429363s, 3.45301MB/s
Read-ahead success for size 32768

2.042496s, 4.10704MB/s
Read-ahead success for size 65536

1.729543s, 4.85019MB/s
Read-ahead success for size 131072

1.641703s, 5.1097MB/s
Read-ahead success for size 262144

1.438638s, 5.83094MB/s
Read-ahead success for size 524288

1.211202s, 6.92585MB/s
Read-ahead success for size 1048576