== sanity test 101b: check stride-io mode read-ahead =========================================================================== 10:05:20 (1758809120)
striped dir -i1 -c2 -H crush2 /mnt/lustre/d101b.sanity

0.903281s, 9.28682MB/s
Read-ahead success for size 8192

0.829859s, 10.1085MB/s
Read-ahead success for size 16384

0.930686s, 9.01336MB/s
Read-ahead success for size 32768

0.706325s, 11.8764MB/s
Read-ahead success for size 65536

0.668174s, 12.5545MB/s
Read-ahead success for size 131072

0.598647s, 14.0126MB/s
Read-ahead success for size 262144

0.658039s, 12.7479MB/s
Read-ahead success for size 524288

0.397094s, 21.125MB/s
Read-ahead success for size 1048576