== sanity test 101b: check stride-io mode read-ahead =========================================================================== 19:54:59 (1785455699)
striped dir -i1 -c2 -H crush2  /mnt/lustre/d101b.sanity

2.617487s, 3.20483MB/s
Read-ahead success for size 8192

2.781330s, 3.01604MB/s
Read-ahead success for size 16384

3.472164s, 2.41596MB/s
Read-ahead success for size 32768

2.248982s, 3.72996MB/s
Read-ahead success for size 65536

2.657365s, 3.15674MB/s
Read-ahead success for size 131072

3.071299s, 2.73129MB/s
Read-ahead success for size 262144

2.210708s, 3.79453MB/s
Read-ahead success for size 524288

1.024775s, 8.1858MB/s
Read-ahead success for size 1048576