== sanity test 101b: check stride-io mode read-ahead =========================================================================== 02:40:32 (1787121632)
striped dir -i1 -c2 -H all_char  /mnt/lustre/d101b.sanity

1.537386s, 5.45641MB/s
Read-ahead success for size 8192

1.706881s, 4.91458MB/s
Read-ahead success for size 16384

1.453342s, 5.77194MB/s
Read-ahead success for size 32768

1.799967s, 4.66042MB/s
Read-ahead success for size 65536

1.793885s, 4.67622MB/s
Read-ahead success for size 131072

1.319780s, 6.35607MB/s
Read-ahead success for size 262144

1.131723s, 7.41224MB/s
Read-ahead success for size 524288

1.435256s, 5.84468MB/s
Read-ahead success for size 1048576