== sanity test 101b: check stride-io mode read-ahead =========================================================================== 11:15:18 (1788362118)
striped dir -i1 -c2 -H crush  /mnt/lustre/d101b.sanity

0.695397s, 12.063MB/s
Read-ahead success for size 8192

0.664320s, 12.6274MB/s
Read-ahead success for size 16384

0.756132s, 11.0941MB/s
Read-ahead success for size 32768

0.761790s, 11.0117MB/s
Read-ahead success for size 65536

0.637760s, 13.1532MB/s
Read-ahead success for size 131072

0.596788s, 14.0563MB/s
Read-ahead success for size 262144

0.504327s, 16.6333MB/s
Read-ahead success for size 524288

0.556575s, 15.0718MB/s
Read-ahead success for size 1048576