== sanity test 101b: check stride-io mode read-ahead =========================================================================== 19:15:37 (1787699737)
striped dir -i1 -c2 -H crush  /mnt/lustre/d101b.sanity

1.727606s, 4.85563MB/s
Read-ahead success for size 8192

1.776769s, 4.72127MB/s
Read-ahead success for size 16384

1.963077s, 4.27319MB/s
Read-ahead success for size 32768

1.900033s, 4.41498MB/s
Read-ahead success for size 65536

1.338727s, 6.26611MB/s
Read-ahead success for size 131072

1.434323s, 5.84848MB/s
Read-ahead success for size 262144

1.354133s, 6.19482MB/s
Read-ahead success for size 524288

1.223134s, 6.85829MB/s
Read-ahead success for size 1048576