== sanity test 101b: check stride-io mode read-ahead =========================================================================== 16:11:46 (1760127106)
striped dir -i1 -c2 -H crush2 /mnt/lustre/d101b.sanity

2.255076s, 3.71988MB/s
Read-ahead success for size 8192

1.997036s, 4.20053MB/s
Read-ahead success for size 16384

2.349810s, 3.56991MB/s
Read-ahead success for size 32768

1.624645s, 5.16335MB/s
Read-ahead success for size 65536

1.548885s, 5.4159MB/s
Read-ahead success for size 131072

0.960702s, 8.73175MB/s
Read-ahead success for size 262144

1.139762s, 7.35996MB/s
Read-ahead success for size 524288

1.201457s, 6.98203MB/s
Read-ahead success for size 1048576