== sanity test 101b: check stride-io mode read-ahead =========================================================================== 02:35:35 (1769758535)
striped dir -i1 -c2 -H crush /mnt/lustre/d101b.sanity

1.238372s, 6.7739MB/s
Read-ahead success for size 8192

1.109707s, 7.5593MB/s
Read-ahead success for size 16384

1.266162s, 6.62522MB/s
Read-ahead success for size 32768

1.013403s, 8.27766MB/s
Read-ahead success for size 65536

0.830734s, 10.0978MB/s
Read-ahead success for size 131072

1.037719s, 8.0837MB/s
Read-ahead success for size 262144

0.871552s, 9.62491MB/s
Read-ahead success for size 524288

0.856883s, 9.78968MB/s
Read-ahead success for size 1048576