== sanity test 101b: check stride-io mode read-ahead =========================================================================== 18:18:53 (1746137933)
striped dir -i1 -c2 -H crush /mnt/lustre/d101b.sanity

0.600961s, 13.9587MB/s
Read-ahead success for size 8192

0.488378s, 17.1765MB/s
Read-ahead success for size 16384

0.583286s, 14.3816MB/s
Read-ahead success for size 32768

0.488171s, 17.1837MB/s
Read-ahead success for size 65536

0.465111s, 18.0357MB/s
Read-ahead success for size 131072

0.476414s, 17.6078MB/s
Read-ahead success for size 262144

0.436953s, 19.198MB/s
Read-ahead success for size 524288

0.421576s, 19.8982MB/s
Read-ahead success for size 1048576