== sanity test 101b: check stride-io mode read-ahead =========================================================================== 05:56:12 (1768128972)
striped dir -i1 -c2 -H crush2 /mnt/lustre/d101b.sanity

0.569609s, 14.727MB/s
Read-ahead success for size 8192

0.563809s, 14.8785MB/s
Read-ahead success for size 16384

0.606921s, 13.8216MB/s
Read-ahead success for size 32768

0.545144s, 15.3879MB/s
Read-ahead success for size 65536

0.503237s, 16.6693MB/s
Read-ahead success for size 131072

0.533213s, 15.7322MB/s
Read-ahead success for size 262144

0.561788s, 14.932MB/s
Read-ahead success for size 524288

0.509305s, 16.4707MB/s
Read-ahead success for size 1048576