== sanity test 101b: check stride-io mode read-ahead =========================================================================== 15:49:59 (1782244199)
striped dir -i1 -c2 -H crush  /mnt/lustre/d101b.sanity

1.913506s, 4.38389MB/s
Read-ahead success for size 8192

1.585987s, 5.2892MB/s
Read-ahead success for size 16384

1.827198s, 4.59097MB/s
Read-ahead success for size 32768

1.588570s, 5.2806MB/s
Read-ahead success for size 65536

1.288140s, 6.51219MB/s
Read-ahead success for size 131072

1.220338s, 6.874MB/s
Read-ahead success for size 262144

1.220843s, 6.87116MB/s
Read-ahead success for size 524288

1.306612s, 6.42012MB/s
Read-ahead success for size 1048576