== sanity test 101b: check stride-io mode read-ahead =========================================================================== 21:46:12 (1781228772)
striped dir -i1 -c2 -H crush  /mnt/lustre/d101b.sanity

1.431992s, 5.858MB/s
Read-ahead success for size 8192

1.721028s, 4.87418MB/s
Read-ahead success for size 16384

1.779918s, 4.71292MB/s
Read-ahead success for size 32768

1.550159s, 5.41145MB/s
Read-ahead success for size 65536

1.445752s, 5.80225MB/s
Read-ahead success for size 131072

1.419949s, 5.90768MB/s
Read-ahead success for size 262144

1.169696s, 7.17161MB/s
Read-ahead success for size 524288

1.339562s, 6.2622MB/s
Read-ahead success for size 1048576