== sanity test 101b: check stride-io mode read-ahead =========================================================================== 06:04:47 (1789985087)
striped dir -i1 -c2 -H all_char  /mnt/lustre/d101b.sanity

0.583715s, 14.3711MB/s
Read-ahead success for size 8192

0.629494s, 13.326MB/s
Read-ahead success for size 16384

0.664225s, 12.6292MB/s
Read-ahead success for size 32768

0.687148s, 12.2079MB/s
Read-ahead success for size 65536

0.505044s, 16.6097MB/s
Read-ahead success for size 131072

0.550514s, 15.2378MB/s
Read-ahead success for size 262144

0.522609s, 16.0514MB/s
Read-ahead success for size 524288

0.485130s, 17.2915MB/s
Read-ahead success for size 1048576