== sanity test 101b: check stride-io mode read-ahead =========================================================================== 17:37:36 (1787434656)
striped dir -i1 -c2 -H crush  /mnt/lustre/d101b.sanity

1.133113s, 7.40315MB/s
Read-ahead success for size 8192

1.290843s, 6.49855MB/s
Read-ahead success for size 16384

1.445895s, 5.80167MB/s
Read-ahead success for size 32768

1.400362s, 5.99031MB/s
Read-ahead success for size 65536

1.418155s, 5.91516MB/s
Read-ahead success for size 131072

1.188527s, 7.05799MB/s
Read-ahead success for size 262144

0.877548s, 9.55914MB/s
Read-ahead success for size 524288

1.077122s, 7.78798MB/s
Read-ahead success for size 1048576