== sanity test 101b: check stride-io mode read-ahead =========================================================================== 13:50:37 (1783965037)
striped dir -i1 -c2 -H crush2  /mnt/lustre/d101b.sanity

1.900701s, 4.41343MB/s
Read-ahead success for size 8192

1.575159s, 5.32556MB/s
Read-ahead success for size 16384

1.851787s, 4.53001MB/s
Read-ahead success for size 32768

1.850270s, 4.53372MB/s
Read-ahead success for size 65536

1.609010s, 5.21352MB/s
Read-ahead success for size 131072

1.329106s, 6.31147MB/s
Read-ahead success for size 262144

1.286490s, 6.52054MB/s
Read-ahead success for size 524288

1.206702s, 6.95168MB/s
Read-ahead success for size 1048576