== sanity test 101b: check stride-io mode read-ahead =========================================================================== 03:20:33 (1789456833)
striped dir -i1 -c2 -H fnv_1a_64  /mnt/lustre/d101b.sanity

1.800524s, 4.65898MB/s
Read-ahead success for size 8192

1.687406s, 4.9713MB/s
Read-ahead success for size 16384

1.969885s, 4.25843MB/s
Read-ahead success for size 32768

1.592353s, 5.26806MB/s
Read-ahead success for size 65536

1.877954s, 4.46689MB/s
Read-ahead success for size 131072

1.689540s, 4.96502MB/s
Read-ahead success for size 262144

1.576903s, 5.31967MB/s
Read-ahead success for size 524288

1.623471s, 5.16708MB/s
Read-ahead success for size 1048576