== sanity test 101b: check stride-io mode read-ahead =========================================================================== 00:59:31 (1726117171)
striped dir -i1 -c2 -H crush /mnt/lustre/d101b.sanity

8.595178s, 0.975967MB/s
Read-ahead success for size 8192

8.125053s, 1.03244MB/s
Read-ahead success for size 16384

7.962271s, 1.05354MB/s
Read-ahead success for size 32768

7.836072s, 1.07051MB/s
Read-ahead success for size 65536

7.498942s, 1.11864MB/s
Read-ahead success for size 131072

7.258622s, 1.15568MB/s
Read-ahead success for size 262144

7.475515s, 1.12214MB/s
Read-ahead success for size 524288

7.038303s, 1.19185MB/s
Read-ahead success for size 1048576