Re: [Xen-devel] 4.1 feature request: block device throttling/scheduling

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Fri, Apr 09, 2010 at 12:13:32PM -0400, T Johnson wrote:
>    Hello,
> 
>    This has already been added to the request list on the wiki, but I wanted
>    to send a quick post here as well if there were any questions or comments.
> 
>    I have problems from time to time with guest VMs using up a lot more of my
>    storage network than I would like. More than just priority scheduling, I
>    would like to be able to tune how many read/write operations per second a
>    VM can perform. Right now, without this ability on my storage network, I
>    can end up having a VM that should be lower priority using up a lot of
>    storage IOPS and starving everything else on the storage network.
> 
>    In an ideal world I could specify that vmX can perform Y writes per second
>    and Z reads per second (since sometimes reads can be less expensive than
>    writes)
> 
>    Please let me know if you have any questions. Adding something like this
>    in would be *greatly* appreciated.
> 

Did you take a look at dm-ioband? 

-- Pasi


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