== sanity test 101b: check stride-io mode read-ahead =========================================================================== 08:51:46 (1788871906)
striped dir -i1 -c2 -H crush2  /mnt/lustre/d101b.sanity

1.907524s, 4.39764MB/s
Read-ahead success for size 8192

1.457483s, 5.75554MB/s
Read-ahead success for size 16384

1.863691s, 4.50107MB/s
Read-ahead success for size 32768

2.379735s, 3.52502MB/s
Read-ahead success for size 65536

2.004436s, 4.18502MB/s
Read-ahead success for size 131072

1.782650s, 4.7057MB/s
Read-ahead success for size 262144

1.370334s, 6.12158MB/s
Read-ahead success for size 524288

1.294583s, 6.47978MB/s
Read-ahead success for size 1048576