== sanity test 101b: check stride-io mode read-ahead =========================================================================== 22:27:53 (1761964073)
striped dir -i1 -c2 -H crush2 /mnt/lustre/d101b.sanity

0.556696s, 15.0686MB/s
Read-ahead success for size 8192

0.571585s, 14.676MB/s
Read-ahead success for size 16384

0.618866s, 13.5548MB/s
Read-ahead success for size 32768

0.489037s, 17.1533MB/s
Read-ahead success for size 65536

0.553441s, 15.1572MB/s
Read-ahead success for size 131072

0.514893s, 16.2919MB/s
Read-ahead success for size 262144

0.444828s, 18.8581MB/s
Read-ahead success for size 524288

0.487571s, 17.2049MB/s
Read-ahead success for size 1048576