== sanity test 101b: check stride-io mode read-ahead =========================================================================== 15:14:36 (1789067676)
striped dir -i1 -c2 -H crush  /mnt/lustre/d101b.sanity

1.770539s, 4.73788MB/s
Read-ahead success for size 8192

1.359246s, 6.17152MB/s
Read-ahead success for size 16384

1.946917s, 4.30866MB/s
Read-ahead success for size 32768

2.144573s, 3.91155MB/s
Read-ahead success for size 65536

1.543406s, 5.43513MB/s
Read-ahead success for size 131072

1.694442s, 4.95066MB/s
Read-ahead success for size 262144

1.260914s, 6.6528MB/s
Read-ahead success for size 524288

1.629424s, 5.1482MB/s
Read-ahead success for size 1048576