== sanity test 101b: check stride-io mode read-ahead =========================================================================== 17:10:53 (1788815453)
striped dir -i1 -c2 -H crush2  /mnt/lustre/d101b.sanity

1.304118s, 6.4324MB/s
Read-ahead success for size 8192

1.221186s, 6.86923MB/s
Read-ahead success for size 16384

1.302457s, 6.4406MB/s
Read-ahead success for size 32768

1.170135s, 7.16892MB/s
Read-ahead success for size 65536

1.169796s, 7.171MB/s
Read-ahead success for size 131072

1.126247s, 7.44828MB/s
Read-ahead success for size 262144

0.907976s, 9.2388MB/s
Read-ahead success for size 524288

0.943829s, 8.88785MB/s
Read-ahead success for size 1048576