== sanity test 101b: check stride-io mode read-ahead =========================================================================== 08:42:19 (1788871339)
striped dir -i1 -c2 -H all_char  /mnt/lustre/d101b.sanity

1.759171s, 4.7685MB/s
Read-ahead success for size 8192

1.451057s, 5.78103MB/s
Read-ahead success for size 16384

2.050585s, 4.09084MB/s
Read-ahead success for size 32768

1.810434s, 4.63348MB/s
Read-ahead success for size 65536

1.055250s, 7.9494MB/s
Read-ahead success for size 131072

1.017126s, 8.24736MB/s
Read-ahead success for size 262144

1.113483s, 7.53367MB/s
Read-ahead success for size 524288

0.871522s, 9.62524MB/s
Read-ahead success for size 1048576