== sanity test 101b: check stride-io mode read-ahead =========================================================================== 22:57:24 (1784170644)
striped dir -i1 -c2 -H all_char  /mnt/lustre/d101b.sanity

0.814034s, 10.305MB/s
Read-ahead success for size 8192

0.862365s, 9.72744MB/s
Read-ahead success for size 16384

0.904967s, 9.26952MB/s
Read-ahead success for size 32768

0.671703s, 12.4886MB/s
Read-ahead success for size 65536

0.630716s, 13.3001MB/s
Read-ahead success for size 131072

0.607627s, 13.8055MB/s
Read-ahead success for size 262144

0.527085s, 15.9151MB/s
Read-ahead success for size 524288

0.426407s, 19.6728MB/s
Read-ahead success for size 1048576