== sanity test 101b: check stride-io mode read-ahead =========================================================================== 17:04:30 (1786827870)
striped dir -i1 -c2 -H crush2  /mnt/lustre/d101b.sanity

1.869737s, 4.48652MB/s
Read-ahead success for size 8192

1.898526s, 4.41848MB/s
Read-ahead success for size 16384

3.527277s, 2.37821MB/s
Read-ahead success for size 32768

1.888429s, 4.44211MB/s
Read-ahead success for size 65536

1.730639s, 4.84712MB/s
Read-ahead success for size 131072

1.450572s, 5.78297MB/s
Read-ahead success for size 262144

1.046870s, 8.01304MB/s
Read-ahead success for size 524288

0.716783s, 11.7031MB/s
Read-ahead success for size 1048576