== sanity test 101b: check stride-io mode read-ahead =========================================================================== 13:53:16 (1771440796)
striped dir -i1 -c2 -H crush /mnt/lustre/d101b.sanity

0.885490s, 9.47341MB/s
Read-ahead success for size 8192

0.955030s, 8.78361MB/s
Read-ahead success for size 16384

0.950357s, 8.8268MB/s
Read-ahead success for size 32768

0.851368s, 9.85309MB/s
Read-ahead success for size 65536

0.822392s, 10.2003MB/s
Read-ahead success for size 131072

0.642129s, 13.0637MB/s
Read-ahead success for size 262144

0.631553s, 13.2825MB/s
Read-ahead success for size 524288

0.591100s, 14.1915MB/s
Read-ahead success for size 1048576