== sanity test 101b: check stride-io mode read-ahead =========================================================================== 06:08:10 (1789380490)
striped dir -i1 -c2 -H all_char  /mnt/lustre/d101b.sanity

2.318423s, 3.61824MB/s
Read-ahead success for size 8192

1.822154s, 4.60368MB/s
Read-ahead success for size 16384

1.465333s, 5.72471MB/s
Read-ahead success for size 32768

1.694214s, 4.95133MB/s
Read-ahead success for size 65536

1.654129s, 5.07131MB/s
Read-ahead success for size 131072

1.245576s, 6.73472MB/s
Read-ahead success for size 262144

1.090683s, 7.69115MB/s
Read-ahead success for size 524288

1.436008s, 5.84162MB/s
Read-ahead success for size 1048576