Re: merging dm-ioband into Linux

[Jonathan Brassow <jbrassow@xxxxxxxxxx>]

Perhaps it will help people to know that there is a good write-up about how it all works at the end of the patch found at:

http://people.valinux.co.jp/~ryov/dm-ioband/patches/dm-ioband-1.7.0.patch

It seem interesting to me.  (I'm still reading through the description and haven't started looking at the code.)

Regarding:

+                ioband_device_id
+
+                          The ID number for an ioband device. The same ID
+                        must be set among the ioband devices that share the
+                        same bandwidth, which means they work on the same
+                        physical disk.

... but it doesn't have to be the same physical disk, right?  It could be a group if disks if you felt the need to do something like that, right?  (You could treat a JBOD as one unit.)  Otherwise, you could probably eliminate this field.

brassow

On Jan 5, 2009, at 7:51 AM, Ryo Tsuruta wrote:

Hi Alasdair,

I know you are very very busy, but could you do me a favor and
respond to my email?

- Have you already looked over the patch?
- What do you think about it?
- Would you consider merging the dm-ioband patch into Linux?
- What else do I need to do it?

Any comments, suggestions or whatever will be grately appreciated.

Thanks,
Ryo Tsuruta

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