== sanity test 101b: check stride-io mode read-ahead =========================================================================== 15:34:11 (1713468851)
striped dir -i1 -c2 -H crush2 /mnt/lustre/d101b.sanity

4.531618s, 1.85113MB/s
Read-ahead success for size 8192

4.094634s, 2.04868MB/s
Read-ahead success for size 16384

4.008788s, 2.09255MB/s
Read-ahead success for size 32768

3.909600s, 2.14564MB/s
Read-ahead success for size 65536

3.795249s, 2.21029MB/s
Read-ahead success for size 131072

3.747862s, 2.23824MB/s
Read-ahead success for size 262144

3.711404s, 2.26022MB/s
Read-ahead success for size 524288

3.465324s, 2.42073MB/s
Read-ahead success for size 1048576