== sanity test 101b: check stride-io mode read-ahead =========================================================================== 09:39:11 (1783517951)
striped dir -i1 -c2 -H crush  /mnt/lustre/d101b.sanity

0.545408s, 15.3804MB/s
Read-ahead success for size 8192

0.563063s, 14.8982MB/s
Read-ahead success for size 16384

0.613567s, 13.6719MB/s
Read-ahead success for size 32768

0.627618s, 13.3658MB/s
Read-ahead success for size 65536

0.539382s, 15.5523MB/s
Read-ahead success for size 131072

0.463234s, 18.1088MB/s
Read-ahead success for size 262144

0.458943s, 18.2781MB/s
Read-ahead success for size 524288

0.454829s, 18.4434MB/s
Read-ahead success for size 1048576