== sanity test 101b: check stride-io mode read-ahead =========================================================================== 20:34:52 (1763084092)
striped dir -i1 -c2 -H crush /mnt/lustre/d101b.sanity

1.213178s, 6.91457MB/s
Read-ahead success for size 8192

1.212624s, 6.91773MB/s
Read-ahead success for size 16384

1.438326s, 5.8322MB/s
Read-ahead success for size 32768

1.114152s, 7.52914MB/s
Read-ahead success for size 65536

1.051533s, 7.9775MB/s
Read-ahead success for size 131072

0.908284s, 9.23567MB/s
Read-ahead success for size 262144

0.780305s, 10.7504MB/s
Read-ahead success for size 524288

0.822111s, 10.2037MB/s
Read-ahead success for size 1048576