== sanity test 101b: check stride-io mode read-ahead =========================================================================== 03:14:41 (1759821281)
striped dir -i1 -c2 -H crush /mnt/lustre/d101b.sanity

0.624648s, 13.4293MB/s
Read-ahead success for size 8192

0.533849s, 15.7134MB/s
Read-ahead success for size 16384

0.569536s, 14.7288MB/s
Read-ahead success for size 32768

0.550639s, 15.2343MB/s
Read-ahead success for size 65536

0.484757s, 17.3048MB/s
Read-ahead success for size 131072

0.485763s, 17.2689MB/s
Read-ahead success for size 262144

0.479233s, 17.5042MB/s
Read-ahead success for size 524288

0.449465s, 18.6635MB/s
Read-ahead success for size 1048576