== sanity test 101b: check stride-io mode read-ahead =========================================================================== 09:36:58 (1783949818)
striped dir -i1 -c2 -H crush2  /mnt/lustre/d101b.sanity

1.471187s, 5.70193MB/s
Read-ahead success for size 8192

2.141009s, 3.91806MB/s
Read-ahead success for size 16384

1.366700s, 6.13786MB/s
Read-ahead success for size 32768

2.321256s, 3.61382MB/s
Read-ahead success for size 65536

1.764389s, 4.7544MB/s
Read-ahead success for size 131072

1.390153s, 6.03431MB/s
Read-ahead success for size 262144

1.430645s, 5.86351MB/s
Read-ahead success for size 524288

1.483642s, 5.65406MB/s
Read-ahead success for size 1048576