== sanity test 101b: check stride-io mode read-ahead =========================================================================== 17:13:52 (1788642832)
striped dir -i1 -c2 -H crush2  /mnt/lustre/d101b.sanity

1.414399s, 5.93086MB/s
Read-ahead success for size 8192

1.625046s, 5.16207MB/s
Read-ahead success for size 16384

1.754997s, 4.77984MB/s
Read-ahead success for size 32768

1.880135s, 4.46171MB/s
Read-ahead success for size 65536

1.863611s, 4.50127MB/s
Read-ahead success for size 131072

1.268922s, 6.61081MB/s
Read-ahead success for size 262144

1.585376s, 5.29124MB/s
Read-ahead success for size 524288

1.433469s, 5.85196MB/s
Read-ahead success for size 1048576