== sanity test 101b: check stride-io mode read-ahead =========================================================================== 00:10:51 (1746072651)
striped dir -i1 -c2 -H all_char /mnt/lustre/d101b.sanity

0.788430s, 10.6396MB/s
Read-ahead success for size 8192

0.604884s, 13.8681MB/s
Read-ahead success for size 16384

0.832071s, 10.0816MB/s
Read-ahead success for size 32768

0.633617s, 13.2392MB/s
Read-ahead success for size 65536

0.559785s, 14.9854MB/s
Read-ahead success for size 131072

0.606336s, 13.8349MB/s
Read-ahead success for size 262144

0.448405s, 18.7077MB/s
Read-ahead success for size 524288

0.453723s, 18.4884MB/s
Read-ahead success for size 1048576