== sanity test 101b: check stride-io mode read-ahead =========================================================================== 02:52:33 (1747810353)
striped dir -i1 -c2 -H crush2 /mnt/lustre/d101b.sanity

0.384187s, 21.8347MB/s
Read-ahead success for size 8192

0.354556s, 23.6595MB/s
Read-ahead success for size 16384

0.376965s, 22.253MB/s
Read-ahead success for size 32768

0.342438s, 24.4967MB/s
Read-ahead success for size 65536

0.299360s, 28.0218MB/s
Read-ahead success for size 131072

0.270686s, 30.9902MB/s
Read-ahead success for size 262144

0.272687s, 30.7628MB/s
Read-ahead success for size 524288

0.320931s, 26.1384MB/s
Read-ahead success for size 1048576