== sanity test 101b: check stride-io mode read-ahead =========================================================================== 09:50:42 (1781617842)
striped dir -i1 -c2 -H all_char  /mnt/lustre/d101b.sanity

0.656590s, 12.776MB/s
Read-ahead success for size 8192

0.649432s, 12.9168MB/s
Read-ahead success for size 16384

0.662348s, 12.665MB/s
Read-ahead success for size 32768

0.581007s, 14.438MB/s
Read-ahead success for size 65536

0.586308s, 14.3075MB/s
Read-ahead success for size 131072

0.533697s, 15.7179MB/s
Read-ahead success for size 262144

0.514549s, 16.3028MB/s
Read-ahead success for size 524288

0.521392s, 16.0889MB/s
Read-ahead success for size 1048576