== sanity test 101b: check stride-io mode read-ahead =========================================================================== 19:57:02 (1789603022)
striped dir -i1 -c2 -H crush  /mnt/lustre/d101b.sanity

1.258350s, 6.66636MB/s
Read-ahead success for size 8192

0.945270s, 8.8743MB/s
Read-ahead success for size 16384

1.447688s, 5.79449MB/s
Read-ahead success for size 32768

1.490795s, 5.62694MB/s
Read-ahead success for size 65536

1.075326s, 7.80099MB/s
Read-ahead success for size 131072

1.345660s, 6.23382MB/s
Read-ahead success for size 262144

1.065062s, 7.87617MB/s
Read-ahead success for size 524288

0.981839s, 8.54377MB/s
Read-ahead success for size 1048576