2009/8/27 Ryo Tsuruta <ryov valinux co jp>
# I've added dm-devel to Cc:.
Thanks for your great job.
Dong-Jae Kang <baramsori72 gmail com> wrote:
> Hi Ryo
> I attached new test result file(ioband-partition-based-evaluation.xls)in
> this mail.
I would like to know the throughput without dm-ioband in your
> In this time, it is not virtualization environment.
> I evaluated partition-based use cases before I do it in vitualization
> because I think the two cases are smilar each other.
> The detailed information about the evaluation can be referred in attached
> If you have any questions or comments after examine it,
> please give me your opinion.
environment. Because the total throughput of range-bw policy is
8000KB/s, which means the device has a capability to perform over
8000KB/s, but the total throughput of weight policy is lower than
the range-bw policy. In my environment, there is no significant
difference in average throughput between with and without dm-ioband.
I ran fio in the way described in your result file. Here are the
results of my environment. The throughputs were calculated from
"iostat -k 1" outputs.
buffered write test
Avg. throughput [KB/s]
w/o ioband w/ioband
sdb2 14485 5788
sdb3 12494 22295
total 26979 28030
OK, good comments.I omitted the total bandwidth of the evaluation system.I will reply to you about it tomorrow after I check and re-test it again.
Thank you for comments.
total bandwidth result.xls
Description: MS-Excel spreadsheet