== sanity test 101b: check stride-io mode read-ahead =========================================================================== 10:03:07 (1746626587)
striped dir -i1 -c2 -H crush2 /mnt/lustre/d101b.sanity

0.385795s, 21.7437MB/s
Read-ahead success for size 8192

0.373530s, 22.4577MB/s
Read-ahead success for size 16384

0.374544s, 22.3969MB/s
Read-ahead success for size 32768

0.366114s, 22.9126MB/s
Read-ahead success for size 65536

0.322838s, 25.984MB/s
Read-ahead success for size 131072

0.270849s, 30.9715MB/s
Read-ahead success for size 262144

0.259633s, 32.3095MB/s
Read-ahead success for size 524288

0.266016s, 31.5342MB/s
Read-ahead success for size 1048576