== sanity test 101b: check stride-io mode read-ahead =========================================================================== 19:06:55 (1781219215)
striped dir -i1 -c2 -H crush  /mnt/lustre/d101b.sanity

2.106224s, 3.98277MB/s
Read-ahead success for size 8192

1.942041s, 4.31948MB/s
Read-ahead success for size 16384

1.921979s, 4.36457MB/s
Read-ahead success for size 32768

2.511201s, 3.34048MB/s
Read-ahead success for size 65536

2.038005s, 4.11609MB/s
Read-ahead success for size 131072

1.853846s, 4.52498MB/s
Read-ahead success for size 262144

1.129447s, 7.42718MB/s
Read-ahead success for size 524288

1.113523s, 7.53339MB/s
Read-ahead success for size 1048576