== sanity test 101b: check stride-io mode read-ahead =========================================================================== 00:56:34 (1763877394)
striped dir -i1 -c2 -H crush /mnt/lustre/d101b.sanity

0.534215s, 15.7027MB/s
Read-ahead success for size 8192

0.505261s, 16.6025MB/s
Read-ahead success for size 16384

0.563595s, 14.8841MB/s
Read-ahead success for size 32768

0.530551s, 15.8111MB/s
Read-ahead success for size 65536

0.475618s, 17.6373MB/s
Read-ahead success for size 131072

0.471400s, 17.7951MB/s
Read-ahead success for size 262144

0.416122s, 20.159MB/s
Read-ahead success for size 524288

0.401419s, 20.8974MB/s
Read-ahead success for size 1048576