== sanity test 101b: check stride-io mode read-ahead =========================================================================== 18:35:42 (1787697342)
striped dir -i1 -c2 -H crush  /mnt/lustre/d101b.sanity

1.798816s, 4.66341MB/s
Read-ahead success for size 8192

1.520770s, 5.51603MB/s
Read-ahead success for size 16384

2.979807s, 2.81515MB/s
Read-ahead success for size 32768

1.721919s, 4.87166MB/s
Read-ahead success for size 65536

1.516012s, 5.53334MB/s
Read-ahead success for size 131072

1.384210s, 6.06021MB/s
Read-ahead success for size 262144

1.663118s, 5.0439MB/s
Read-ahead success for size 524288

1.912930s, 4.38521MB/s
Read-ahead success for size 1048576