== sanity test 101b: check stride-io mode read-ahead =========================================================================== 06:14:59 (1744020899)
striped dir -i1 -c2 -H crush2 /mnt/lustre/d101b.sanity

0.378714s, 22.1502MB/s
Read-ahead success for size 8192

0.354234s, 23.681MB/s
Read-ahead success for size 16384

0.378783s, 22.1462MB/s
Read-ahead success for size 32768

0.366224s, 22.9057MB/s
Read-ahead success for size 65536

0.280046s, 29.9544MB/s
Read-ahead success for size 131072

0.315799s, 26.5631MB/s
Read-ahead success for size 262144

0.275600s, 30.4376MB/s
Read-ahead success for size 524288

0.243116s, 34.5045MB/s
Read-ahead success for size 1048576