== sanity test 101b: check stride-io mode read-ahead =========================================================================== 21:14:00 (1787102040)
striped dir -i1 -c2 -H all_char  /mnt/lustre/d101b.sanity

0.497589s, 16.8585MB/s
Read-ahead success for size 8192

0.522189s, 16.0643MB/s
Read-ahead success for size 16384

0.577710s, 14.5204MB/s
Read-ahead success for size 32768

0.568012s, 14.7684MB/s
Read-ahead success for size 65536

0.459049s, 18.2739MB/s
Read-ahead success for size 131072

0.423063s, 19.8283MB/s
Read-ahead success for size 262144

0.449095s, 18.6789MB/s
Read-ahead success for size 524288

0.390591s, 21.4767MB/s
Read-ahead success for size 1048576