== sanity test 101b: check stride-io mode read-ahead =========================================================================== 23:05:56 (1770437156)
striped dir -i1 -c2 -H crush2 /mnt/lustre/d101b.sanity

0.669808s, 12.5239MB/s
Read-ahead success for size 8192

0.678532s, 12.3629MB/s
Read-ahead success for size 16384

0.661343s, 12.6842MB/s
Read-ahead success for size 32768

0.594366s, 14.1135MB/s
Read-ahead success for size 65536

0.537265s, 15.6135MB/s
Read-ahead success for size 131072

0.463611s, 18.0941MB/s
Read-ahead success for size 262144

0.503733s, 16.6529MB/s
Read-ahead success for size 524288

0.472058s, 17.7703MB/s
Read-ahead success for size 1048576