== sanity test 101b: check stride-io mode read-ahead =========================================================================== 08:16:33 (1789128993)
striped dir -i1 -c2 -H all_char  /mnt/lustre/d101b.sanity

1.843180s, 4.55116MB/s
Read-ahead success for size 8192

1.836795s, 4.56698MB/s
Read-ahead success for size 16384

2.236104s, 3.75144MB/s
Read-ahead success for size 32768

1.840672s, 4.55736MB/s
Read-ahead success for size 65536

1.741083s, 4.81804MB/s
Read-ahead success for size 131072

1.799855s, 4.66071MB/s
Read-ahead success for size 262144

1.593312s, 5.26489MB/s
Read-ahead success for size 524288

1.318585s, 6.36183MB/s
Read-ahead success for size 1048576