== sanity test 101b: check stride-io mode read-ahead =========================================================================== 12:45:49 (1788799549)
striped dir -i1 -c2 -H crush2  /mnt/lustre/d101b.sanity

2.066072s, 4.06017MB/s
Read-ahead success for size 8192

1.786285s, 4.69612MB/s
Read-ahead success for size 16384

2.397123s, 3.49945MB/s
Read-ahead success for size 32768

2.120904s, 3.9552MB/s
Read-ahead success for size 65536

1.780225s, 4.71211MB/s
Read-ahead success for size 131072

1.424965s, 5.88689MB/s
Read-ahead success for size 262144

1.296951s, 6.46795MB/s
Read-ahead success for size 524288

1.297335s, 6.46603MB/s
Read-ahead success for size 1048576