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

[T Johnson <tjohnson46@xxxxxxxxx>]

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.

Thanks,
Thomas
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