== sanity test 101b: check stride-io mode read-ahead =========================================================================== 10:46:20 (1788360380)
striped dir -i1 -c2 -H crush  /mnt/lustre/d101b.sanity

0.792409s, 10.5862MB/s
Read-ahead success for size 8192

0.855498s, 9.80553MB/s
Read-ahead success for size 16384

0.870747s, 9.63381MB/s
Read-ahead success for size 32768

0.769885s, 10.8959MB/s
Read-ahead success for size 65536

0.680144s, 12.3336MB/s
Read-ahead success for size 131072

0.680665s, 12.3241MB/s
Read-ahead success for size 262144

0.643368s, 13.0386MB/s
Read-ahead success for size 524288

0.602053s, 13.9333MB/s
Read-ahead success for size 1048576