== sanity test 101b: check stride-io mode read-ahead =========================================================================== 08:54:41 (1788872081)
striped dir -i1 -c2 -H crush2  /mnt/lustre/d101b.sanity

2.873089s, 2.91972MB/s
Read-ahead success for size 8192

3.059434s, 2.74188MB/s
Read-ahead success for size 16384

2.303621s, 3.64149MB/s
Read-ahead success for size 32768

3.023355s, 2.7746MB/s
Read-ahead success for size 65536

1.970913s, 4.2562MB/s
Read-ahead success for size 131072

1.614229s, 5.19667MB/s
Read-ahead success for size 262144

1.975690s, 4.24591MB/s
Read-ahead success for size 524288

1.263024s, 6.64169MB/s
Read-ahead success for size 1048576