== sanity test 101b: check stride-io mode read-ahead =========================================================================== 10:35:50 (1781274950)
striped dir -i1 -c2 -H crush2  /mnt/lustre/d101b.sanity

1.674862s, 5.00854MB/s
Read-ahead success for size 8192

1.571784s, 5.337MB/s
Read-ahead success for size 16384

2.029522s, 4.13329MB/s
Read-ahead success for size 32768

1.829133s, 4.58611MB/s
Read-ahead success for size 65536

1.435494s, 5.84371MB/s
Read-ahead success for size 131072

1.528930s, 5.48659MB/s
Read-ahead success for size 262144

1.341481s, 6.25324MB/s
Read-ahead success for size 524288

1.492540s, 5.62036MB/s
Read-ahead success for size 1048576