== sanity test 101b: check stride-io mode read-ahead =========================================================================== 09:43:18 (1773236598)
striped dir -i1 -c2 -H crush2 /mnt/lustre/d101b.sanity

0.630566s, 13.3033MB/s
Read-ahead success for size 8192

0.552873s, 15.1728MB/s
Read-ahead success for size 16384

0.613048s, 13.6834MB/s
Read-ahead success for size 32768

0.536813s, 15.6267MB/s
Read-ahead success for size 65536

0.516948s, 16.2272MB/s
Read-ahead success for size 131072

0.461210s, 18.1883MB/s
Read-ahead success for size 262144

0.442964s, 18.9374MB/s
Read-ahead success for size 524288

0.460180s, 18.229MB/s
Read-ahead success for size 1048576