Hi Experts,
I use vdbench on AIX, but it reports strange response time at very short response time situation. Does anyone know such problem? I think this is round up/down or calculation bug.
config file:
:
wd=wd_age,sd=sd*,xfersize=8k,rdpct=0,seekpct=100
rd=age1,wd=wd_age,iorate=360000,interval=3,elapsed=120,maxdata=3599g,forthreads=8
rd=age2,wd=wd_age,iorate=30000,interval=3,elapsed=120,maxdata=3599g,forthreads=8
rd=age3,wd=wd_age,iorate=90000,interval=3,elapsed=120,maxdata=3599g,forthreads=8
rd=age4,wd=wd_age,iorate=180000,interval=3,elapsed=120,maxdata=3599g,forthreads=8
:
result:
At iorate=360000, I got 1.2ms response time from vdbench, 0.8ms from AIX nmon, 0.7ms from Storage controller. This result is seems correct.
At iorate=30000, I got 2ms response time from vdbench, 0.1ms from AIX nmon, 0.08ms from Storage controller. Only vdbench result is longer than nmon and storage controller.