[dm-devel] Re: Test results of dm-ioband

[Ryo Tsuruta]

Hi,

Takabe-san, thank you for testing dm-ioband, and I'm glad to hear that
it worked on your computer.

Agk, as the result shows, dm-ioband is stable and works well. I hope
it gets merged into upstream, but does dm-ioband need to be tested or
to be reviewed by someone else?

BTW, I've posted some dm-ioband patches, but the current dm quilt tree
doesn't reflect them. Is there any problem with my way of posting?

Thanks,
Ryo Tsuruta

From: Akio Takebe <takebe_akio at jp.fujitsu.com>
Subject: Test results of dm-ioband
Date: Thu, 19 Mar 2009 16:51:55 +0900

> Hi, all
> 
> Nice to meet you. I'm new to device-mapper.
> I'd like to use dm-ioband because it would be useful for virtual environment(kvm, xen).
> So I tested dm-ioband, and my test results are below.
> I hope it's a help that dm-ioband is committed to mainline.
> Any comments are welcome.
> 
> Tested-by: Akio Takebe <takebe_akio at jp.fujitsu.com>
> 
> Test Discription:
> 
> Reference:
>   http://people.valinux.co.jp/~ryov/bwctl/
> 
> Setup infomation:
>   1. compile and loading module
>     http://people.valinux.co.jp/~ryov/bwctl/
>     http://people.valinux.co.jp/~ryov/dm-ioband/manual/setup.html
>   2. setup dmioband
>     # echo "0 $(blockdev --getsize /dev/sdb7) ioband /dev/sdb7 1 0 0 none" "weight 0 :40" | dmsetup create ioband1
>     # echo "0 $(blockdev --getsize /dev/sdb8) ioband /dev/sdb8 1 0 0 none" "weight 0 :10" | dmsetup create ioband2
>     # mkfs.ext3 /dev/mapper/ioband1
>     # mkfs.ext3 /dev/mapper/ioband2
>     # mount /dev/mapper/ioband1 /mnt1
>     # mount /dev/mapper/ioband2 /mnt2
> 
> Test Items
> - load/unload module : OK
> - dmsetup targets show ioband: OK
> - Performance test results (fio)
>     Summary of results
>                          throughput [KiB/s]    % of throughput of
>     device   weight(%)   read  write  total    ioband1 + ioband2
>     ioband1   40(80%)     328    335    663          79.59%
>     ioband2   10(20%)      87     83    170          20.41%
> 
> - I/O load (dd):
>   I used some I/O load with dd command.
>   I confirmed that the filesystem didn't break down.
>   The files written by dd were also sane.
> 
> Best Regards,
> 
> Akio Takebe