== sanity test 101b: check stride-io mode read-ahead =========================================================================== 22:26:37 (1789266397)
striped dir -i1 -c2 -H crush2  /mnt/lustre/d101b.sanity

1.744883s, 4.80755MB/s
Read-ahead success for size 8192

1.157666s, 7.24614MB/s
Read-ahead success for size 16384

1.418496s, 5.91373MB/s
Read-ahead success for size 32768

2.250348s, 3.72769MB/s
Read-ahead success for size 65536

1.990918s, 4.21344MB/s
Read-ahead success for size 131072

1.634674s, 5.13167MB/s
Read-ahead success for size 262144

1.057885s, 7.9296MB/s
Read-ahead success for size 524288

1.461568s, 5.73946MB/s
Read-ahead success for size 1048576