== sanity test 101b: check stride-io mode read-ahead =========================================================================== 09:23:03 (1783948983)
striped dir -i1 -c2 -H crush2  /mnt/lustre/d101b.sanity

1.220149s, 6.87507MB/s
Read-ahead success for size 8192

1.115535s, 7.51981MB/s
Read-ahead success for size 16384

1.686685s, 4.97343MB/s
Read-ahead success for size 32768

1.477533s, 5.67744MB/s
Read-ahead success for size 65536

1.705433s, 4.91876MB/s
Read-ahead success for size 131072

1.445683s, 5.80252MB/s
Read-ahead success for size 262144

1.311952s, 6.39399MB/s
Read-ahead success for size 524288

0.961438s, 8.72506MB/s
Read-ahead success for size 1048576