== sanity test 101b: check stride-io mode read-ahead =========================================================================== 08:37:42 (1787315862)
striped dir -i1 -c2 -H crush2  /mnt/lustre/d101b.sanity

2.008697s, 4.17614MB/s
Read-ahead success for size 8192

2.135843s, 3.92754MB/s
Read-ahead success for size 16384

1.786645s, 4.69517MB/s
Read-ahead success for size 32768

1.837433s, 4.5654MB/s
Read-ahead success for size 65536

1.812172s, 4.62904MB/s
Read-ahead success for size 131072

1.286851s, 6.51871MB/s
Read-ahead success for size 262144

1.245006s, 6.73781MB/s
Read-ahead success for size 524288

1.100814s, 7.62037MB/s
Read-ahead success for size 1048576