== sanity test 101b: check stride-io mode read-ahead =========================================================================== 22:48:27 (1747795707)
striped dir -i1 -c2 -H crush2 /mnt/lustre/d101b.sanity

0.608467s, 13.7865MB/s
Read-ahead success for size 8192

0.570159s, 14.7128MB/s
Read-ahead success for size 16384

0.624797s, 13.4261MB/s
Read-ahead success for size 32768

0.462715s, 18.1291MB/s
Read-ahead success for size 65536

0.419456s, 19.9988MB/s
Read-ahead success for size 131072

0.416027s, 20.1636MB/s
Read-ahead success for size 262144

0.397881s, 21.0832MB/s
Read-ahead success for size 524288

0.274814s, 30.5247MB/s
Read-ahead success for size 1048576