== sanity test 101b: check stride-io mode read-ahead =========================================================================== 14:44:32 (1787856272)
striped dir -i1 -c2 -H crush  /mnt/lustre/d101b.sanity

1.919536s, 4.37012MB/s
Read-ahead success for size 8192

2.128715s, 3.94069MB/s
Read-ahead success for size 16384

1.934505s, 4.33631MB/s
Read-ahead success for size 32768

1.983173s, 4.22989MB/s
Read-ahead success for size 65536

1.783705s, 4.70291MB/s
Read-ahead success for size 131072

1.411629s, 5.9425MB/s
Read-ahead success for size 262144

1.108597s, 7.56687MB/s
Read-ahead success for size 524288

1.515135s, 5.53654MB/s
Read-ahead success for size 1048576