== sanity test 101b: check stride-io mode read-ahead =========================================================================== 15:47:08 (1783972028)
striped dir -i1 -c2 -H all_char  /mnt/lustre/d101b.sanity

2.280827s, 3.67788MB/s
Read-ahead success for size 8192

1.673442s, 5.01279MB/s
Read-ahead success for size 16384

2.634666s, 3.18394MB/s
Read-ahead success for size 32768

2.253799s, 3.72199MB/s
Read-ahead success for size 65536

1.962539s, 4.27436MB/s
Read-ahead success for size 131072

1.733679s, 4.83862MB/s
Read-ahead success for size 262144

1.464782s, 5.72686MB/s
Read-ahead success for size 524288

1.192176s, 7.03638MB/s
Read-ahead success for size 1048576