== sanity test 101b: check stride-io mode read-ahead =========================================================================== 21:39:00 (1788917940)
striped dir -i1 -c2 -H crush  /mnt/lustre/d101b.sanity

0.499528s, 16.7931MB/s
Read-ahead success for size 8192

0.478647s, 17.5257MB/s
Read-ahead success for size 16384

0.527289s, 15.9089MB/s
Read-ahead success for size 32768

0.514790s, 16.2952MB/s
Read-ahead success for size 65536

0.494599s, 16.9604MB/s
Read-ahead success for size 131072

0.486005s, 17.2603MB/s
Read-ahead success for size 262144

0.491303s, 17.0742MB/s
Read-ahead success for size 524288

0.420205s, 19.9631MB/s
Read-ahead success for size 1048576