== sanity test 101b: check stride-io mode read-ahead =========================================================================== 11:34:15 (1786203255)
striped dir -i1 -c2 -H crush  /mnt/lustre/d101b.sanity

0.629965s, 13.316MB/s
Read-ahead success for size 8192

0.646024s, 12.985MB/s
Read-ahead success for size 16384

0.748246s, 11.211MB/s
Read-ahead success for size 32768

0.539163s, 15.5586MB/s
Read-ahead success for size 65536

0.499218s, 16.8035MB/s
Read-ahead success for size 131072

0.561336s, 14.944MB/s
Read-ahead success for size 262144

0.534953s, 15.681MB/s
Read-ahead success for size 524288

0.459892s, 18.2404MB/s
Read-ahead success for size 1048576