== sanity test 101b: check stride-io mode read-ahead =========================================================================== 13:41:22 (1790098882)
striped dir -i1 -c2 -H crush  /mnt/lustre/d101b.sanity

1.453229s, 5.77239MB/s
Read-ahead success for size 8192

1.180675s, 7.10493MB/s
Read-ahead success for size 16384

1.272437s, 6.59255MB/s
Read-ahead success for size 32768

1.109750s, 7.55901MB/s
Read-ahead success for size 65536

0.982309s, 8.53968MB/s
Read-ahead success for size 131072

0.912126s, 9.19676MB/s
Read-ahead success for size 262144

0.815850s, 10.282MB/s
Read-ahead success for size 524288

0.808582s, 10.3745MB/s
Read-ahead success for size 1048576