== sanity test 101b: check stride-io mode read-ahead =========================================================================== 02:45:12 (1787381112)
striped dir -i1 -c2 -H all_char  /mnt/lustre/d101b.sanity

1.585076s, 5.29224MB/s
Read-ahead success for size 8192

1.703432s, 4.92453MB/s
Read-ahead success for size 16384

1.823089s, 4.60132MB/s
Read-ahead success for size 32768

1.926105s, 4.35522MB/s
Read-ahead success for size 65536

1.437760s, 5.8345MB/s
Read-ahead success for size 131072

1.266299s, 6.62451MB/s
Read-ahead success for size 262144

1.292590s, 6.48977MB/s
Read-ahead success for size 524288

1.202599s, 6.9754MB/s
Read-ahead success for size 1048576