== sanity test 101b: check stride-io mode read-ahead =========================================================================== 17:09:13 (1712264953)
striped dir -i1 -c2 -H crush2 /mnt/lustre/d101b.sanity

5.230106s, 1.60391MB/s
Read-ahead success for size 8192

5.544557s, 1.51294MB/s
Read-ahead success for size 16384

7.087841s, 1.18352MB/s
Read-ahead success for size 32768

7.132908s, 1.17604MB/s
Read-ahead success for size 65536

6.333466s, 1.32449MB/s
Read-ahead success for size 131072

6.954174s, 1.20627MB/s
Read-ahead success for size 262144

6.917047s, 1.21274MB/s
Read-ahead success for size 524288

6.424023s, 1.30582MB/s
Read-ahead success for size 1048576