<div>Hi Ryo<br></div>
<div>Sorry for late reply.</div>
<div> </div>
<div>Mr Lee and I tested total bandwidth as you requested and the result is like attached file.</div>
<div> </div>
<div>I know file attaching is not proper in mailing list,</div>
<div>but I selected it for efficient and easy communication. sorry :)</div>
<div> </div>
<div>And Buffed-Device case can be some strange,</div>
<div>it has too much variation in total bandwidth, So you had better to see as only reference.</div>
<div>The rests didn't have big fluctuation such like Buffered-Device case.</div>
<div> </div>
<div>if you have another request about the result, </div>
<div>reply to me about that.</div>
<div> </div>
<div>Additionally, I will try to inform the test results in cgroup environment of you in case by case.</div>
<div>What do you think about it?</div>
<div>If you are busy these days, it is OK to delay it later</div>
<div>.</div>
<div>Thank you.</div>
<div> </div>
<div> </div>
<div class="gmail_quote">2009/8/31 Ryo Tsuruta <span dir="ltr"><<a href="mailto:ryov@valinux.co.jp">ryov@valinux.co.jp</a>></span><br>
<blockquote style="BORDER-LEFT: #ccc 1px solid; MARGIN: 0px 0px 0px 0.8ex; PADDING-LEFT: 1ex" class="gmail_quote">Hi Dong-Jae,<br><br>Thanks for testing.<br>Could you do the same test without dm-ioband? I would like to know<br>
the throughput of your disk drive and a difference with and withour<br>dm-ioband.<br><br>Thanks,<br><font color="#888888">Ryo Tsuruta<br></font>
<div>
<div></div>
<div class="h5"><br>Dong-Jae Kang <<a href="mailto:baramsori72@gmail.com">baramsori72@gmail.com</a>> wrote:<br>> Hi Ryo<br>> I attached new file that includes I/O total bandwidth of evaluation system.<br>> We tested total bandwidth of weight policy by I/O in Dom0 and DomU system<br>
> and it is measured through iostat tool and dm-ioband debug patch which I<br>> gave you several months ago.<br>> Of course, the result in prior report was measured by dm-ioband debug patch.<br>><br>> As a result, the big difference in prior report derives from the location<br>
> where we measured I/O bandwidth<br>> iostat counts it in application level and dm-ioband debug patch does it in<br>> dm-ioband controller.<br>> I think the difference is related with buffer cache.<br>><br>
> Thank you.<br>> Have a nice weekend<br>><br>> 2009/8/27 Dong-Jae Kang <<a href="mailto:baramsori72@gmail.com">baramsori72@gmail.com</a>><br>><br>> > Hi Ryo<br>> ><br>> > 2009/8/27 Ryo Tsuruta <<a href="mailto:ryov@valinux.co.jp">ryov@valinux.co.jp</a>><br>
> ><br>> > Hi Dong-Jae,<br>> >><br>> >> # I've added dm-devel to Cc:.<br>> >><br>> >> Dong-Jae Kang <<a href="mailto:baramsori72@gmail.com">baramsori72@gmail.com</a>> wrote:<br>
> >> > Hi Ryo<br>> >> ><br>> >> > I attached new test result file(ioband-partition-based-evaluation.xls)in<br>> >> > this mail.<br>> >><br>> >> Thanks for your great job.<br>
> >><br>> >> > In this time, it is not virtualization environment.<br>> >> > I evaluated partition-based use cases before I do it in vitualization<br>> >> > environment.<br>> >> > because I think the two cases are smilar each other.<br>
> >> ><br>> >> > The detailed information about the evaluation can be referred in<br>> >> attached<br>> >> > file.<br>> >> ><br>> >> > If you have any questions or comments after examine it,<br>
> >> > please give me your opinion.<br>> >><br>> >> I would like to know the throughput without dm-ioband in your<br>> >> environment. Because the total throughput of range-bw policy is<br>
> >> 8000KB/s, which means the device has a capability to perform over<br>> >> 8000KB/s, but the total throughput of weight policy is lower than<br>> >> the range-bw policy. In my environment, there is no significant<br>
> >> difference in average throughput between with and without dm-ioband.<br>> >> I ran fio in the way described in your result file. Here are the<br>> >> results of my environment. The throughputs were calculated from<br>
> >> "iostat -k 1" outputs.<br>> >><br>> >> buffered write test<br>> >> Avg. throughput [KB/s]<br>> >> w/o ioband w/ioband<br>> >> sdb2 14485 5788<br>
> >> sdb3 12494 22295<br>> >> total 26979 28030<br>> >><br>> ><br>> > OK, good comments.<br>> > I omitted the total bandwidth of the evaluation system.<br>
> ><br>> > I will reply to you about it tomorrow after I check and re-test it again.<br>> ><br>> >><br>> >> Thanks,<br>> >> Ryo Tsuruta<br>> >><br>> ><br>> > Thank you for comments.<br>
> ><br>> ><br>> > --<br>> > Best Regards,<br>> > Dong-Jae Kang<br>> ><br>><br>><br>><br>> --<br>> Best Regards,<br>> Dong-Jae Kang<br></div></div></blockquote></div><br>
<br clear="all">
<div></div><br>-- <br>Best Regards,<br>Dong-Jae Kang<br>