== sanity test 101b: check stride-io mode read-ahead =========================================================================== 09:38:31 (1770647911)
striped dir -i1 -c2 -H crush /mnt/lustre/d101b.sanity

0.671280s, 12.4964MB/s
Read-ahead success for size 8192

0.755706s, 11.1004MB/s
Read-ahead success for size 16384

0.663906s, 12.6352MB/s
Read-ahead success for size 32768

0.461585s, 18.1735MB/s
Read-ahead success for size 65536

0.419917s, 19.9768MB/s
Read-ahead success for size 131072

0.369035s, 22.7312MB/s
Read-ahead success for size 262144

0.382234s, 21.9463MB/s
Read-ahead success for size 524288

0.466032s, 18.0001MB/s
Read-ahead success for size 1048576