nathanejohnson edited a comment on issue #3986: Change listVpcOfferings 
endpoint and createVpcOffering endpoint
URL: https://github.com/apache/cloudstack/pull/3986#issuecomment-606331193
 
 
   This isn't host specific, in this case "hypervisor specific" implies that 
for kvm these knobs are part of the domain xml and kvm itself implements the 
throttling.  The other option is to use some external managed storage provider 
- like solidfire.  I do think in a perfect world these would have been 
implemented in such a way that it would be easy to override on a per-VM basis, 
such as with "custom", but that's now how it's done today, and it wouldn't be 
the easiest lift in the world to do it either.  This isn't to say I'm against 
the implementation.   But the libvirt IO throttling functionality has worked 
basically the same way for quite some time now with the exception to a few 
additional tunables we added over the past year or so.  At present, the only 
way to change these limits are to dip to the database, or to use a patched 
update service offering call.

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