== sanity test 101b: check stride-io mode read-ahead =========================================================================== 18:27:02 (1736983622)
striped dir -i1 -c2 -H crush /mnt/lustre/d101b.sanity

0.043707s, 191.928MB/s
Read-ahead success for size 8192

0.043661s, 192.13MB/s
Read-ahead success for size 16384

0.039090s, 214.597MB/s
Read-ahead success for size 32768

0.044064s, 190.373MB/s
Read-ahead success for size 65536

0.043874s, 191.198MB/s
Read-ahead success for size 131072

0.048087s, 174.446MB/s
Read-ahead success for size 262144

0.043253s, 193.943MB/s
Read-ahead success for size 524288

0.048956s, 171.35MB/s
Read-ahead success for size 1048576