== sanity test 101b: check stride-io mode read-ahead =========================================================================== 12:05:19 (1788451519)
striped dir -i1 -c2 -H crush  /mnt/lustre/d101b.sanity

1.545600s, 5.42741MB/s
Read-ahead success for size 8192

1.708315s, 4.91046MB/s
Read-ahead success for size 16384

1.621936s, 5.17197MB/s
Read-ahead success for size 32768

1.740660s, 4.81921MB/s
Read-ahead success for size 65536

1.470642s, 5.70404MB/s
Read-ahead success for size 131072

1.577542s, 5.31752MB/s
Read-ahead success for size 262144

1.364592s, 6.14734MB/s
Read-ahead success for size 524288

1.162243s, 7.2176MB/s
Read-ahead success for size 1048576