== sanity test 101b: check stride-io mode read-ahead =========================================================================== 16:53:26 (1786481606)
striped dir -i1 -c2 -H crush2  /mnt/lustre/d101b.sanity

1.675634s, 5.00623MB/s
Read-ahead success for size 8192

1.389977s, 6.03507MB/s
Read-ahead success for size 16384

1.658995s, 5.05644MB/s
Read-ahead success for size 32768

1.685000s, 4.9784MB/s
Read-ahead success for size 65536

1.330053s, 6.30697MB/s
Read-ahead success for size 131072

1.553437s, 5.40003MB/s
Read-ahead success for size 262144

1.242067s, 6.75375MB/s
Read-ahead success for size 524288

0.956520s, 8.76992MB/s
Read-ahead success for size 1048576