== sanity test 101b: check stride-io mode read-ahead =========================================================================== 20:10:31 (1789603831)
striped dir -i1 -c2 -H all_char  /mnt/lustre/d101b.sanity

1.413483s, 5.93471MB/s
Read-ahead success for size 8192

1.347549s, 6.22509MB/s
Read-ahead success for size 16384

1.633180s, 5.13636MB/s
Read-ahead success for size 32768

1.597672s, 5.25052MB/s
Read-ahead success for size 65536

1.650590s, 5.08219MB/s
Read-ahead success for size 131072

1.044170s, 8.03376MB/s
Read-ahead success for size 262144

1.512675s, 5.54555MB/s
Read-ahead success for size 524288

1.373606s, 6.107MB/s
Read-ahead success for size 1048576