== sanity test 101b: check stride-io mode read-ahead =========================================================================== 21:34:30 (1782610470)
striped dir -i1 -c2 -H crush  /mnt/lustre/d101b.sanity

1.700376s, 4.93338MB/s
Read-ahead success for size 8192

1.484973s, 5.649MB/s
Read-ahead success for size 16384

2.586933s, 3.24268MB/s
Read-ahead success for size 32768

1.777558s, 4.71918MB/s
Read-ahead success for size 65536

1.648110s, 5.08984MB/s
Read-ahead success for size 131072

1.007788s, 8.32378MB/s
Read-ahead success for size 262144

1.511950s, 5.5482MB/s
Read-ahead success for size 524288

1.207159s, 6.94905MB/s
Read-ahead success for size 1048576