== sanity test 101b: check stride-io mode read-ahead =========================================================================== 18:02:47 (1786831367)
striped dir -i1 -c2 -H crush  /mnt/lustre/d101b.sanity

1.698018s, 4.94024MB/s
Read-ahead success for size 8192

1.655389s, 5.06745MB/s
Read-ahead success for size 16384

2.188205s, 3.83356MB/s
Read-ahead success for size 32768

1.441367s, 5.8199MB/s
Read-ahead success for size 65536

1.877150s, 4.4688MB/s
Read-ahead success for size 131072

1.171298s, 7.16181MB/s
Read-ahead success for size 262144

1.332183s, 6.29689MB/s
Read-ahead success for size 524288

1.763695s, 4.75627MB/s
Read-ahead success for size 1048576