== sanity test 101b: check stride-io mode read-ahead =========================================================================== 03:10:09 (1771402209)
striped dir -i1 -c2 -H crush /mnt/lustre/d101b.sanity

1.230350s, 6.81807MB/s
Read-ahead success for size 8192

1.335217s, 6.28258MB/s
Read-ahead success for size 16384

1.564678s, 5.36124MB/s
Read-ahead success for size 32768

1.170214s, 7.16844MB/s
Read-ahead success for size 65536

0.955619s, 8.77819MB/s
Read-ahead success for size 131072

0.962534s, 8.71513MB/s
Read-ahead success for size 262144

1.008033s, 8.32176MB/s
Read-ahead success for size 524288

0.888412s, 9.44225MB/s
Read-ahead success for size 1048576