== sanity test 101b: check stride-io mode read-ahead =========================================================================== 01:47:09 (1761284829)
striped dir -i1 -c2 -H crush /mnt/lustre/d101b.sanity

1.098254s, 7.63813MB/s
Read-ahead success for size 8192

2.061583s, 4.06901MB/s
Read-ahead success for size 16384

1.564747s, 5.361MB/s
Read-ahead success for size 32768

1.280711s, 6.54996MB/s
Read-ahead success for size 65536

1.365153s, 6.14481MB/s
Read-ahead success for size 131072

1.163023s, 7.21276MB/s
Read-ahead success for size 262144

1.277809s, 6.56484MB/s
Read-ahead success for size 524288

1.085684s, 7.72657MB/s
Read-ahead success for size 1048576