== sanity test 101b: check stride-io mode read-ahead =========================================================================== 20:22:53 (1775866973)
striped dir -i1 -c2 -H crush /mnt/lustre/d101b.sanity

0.917857s, 9.13934MB/s
Read-ahead success for size 8192

0.992878s, 8.44878MB/s
Read-ahead success for size 16384

1.126002s, 7.44991MB/s
Read-ahead success for size 32768

1.075119s, 7.80249MB/s
Read-ahead success for size 65536

0.898213s, 9.33922MB/s
Read-ahead success for size 131072

0.684891s, 12.2481MB/s
Read-ahead success for size 262144

0.707669s, 11.8539MB/s
Read-ahead success for size 524288

0.668999s, 12.539MB/s
Read-ahead success for size 1048576