== sanity test 101b: check stride-io mode read-ahead =========================================================================== 06:03:48 (1744884228)
striped dir -i1 -c2 -H crush /mnt/lustre/d101b.sanity

0.388836s, 21.5736MB/s
Read-ahead success for size 8192

0.387063s, 21.6725MB/s
Read-ahead success for size 16384

0.448902s, 18.6869MB/s
Read-ahead success for size 32768

0.394944s, 21.24MB/s
Read-ahead success for size 65536

0.335250s, 25.0219MB/s
Read-ahead success for size 131072

0.316529s, 26.5019MB/s
Read-ahead success for size 262144

0.278562s, 30.114MB/s
Read-ahead success for size 524288

0.286887s, 29.2401MB/s
Read-ahead success for size 1048576