== sanity test 101b: check stride-io mode read-ahead =========================================================================== 22:43:14 (1784342594)
striped dir -i1 -c2 -H crush2  /mnt/lustre/d101b.sanity

0.557948s, 15.0347MB/s
Read-ahead success for size 8192

0.533699s, 15.7179MB/s
Read-ahead success for size 16384

0.593781s, 14.1274MB/s
Read-ahead success for size 32768

0.540799s, 15.5115MB/s
Read-ahead success for size 65536

0.518514s, 16.1782MB/s
Read-ahead success for size 131072

0.434962s, 19.2858MB/s
Read-ahead success for size 262144

0.405737s, 20.675MB/s
Read-ahead success for size 524288

0.438585s, 19.1265MB/s
Read-ahead success for size 1048576