Open Stack

On Fri, Aug 26, 2016 at 10:20 AM, Ed Leafe <ed at leafe.com> wrote:

> On Aug 25, 2016, at 3:19 PM, Andrew Laski <andrew at lascii.com> wrote:
>
> > One other thing to note is that while a flavor constrains how much local
> > disk is used it does not constrain volume size at all. So a user can
> > specify an ephemeral/swap disk <= to what the flavor provides but can
> > have an arbitrary sized root disk if it's a remote volume.
>
> This kind of goes to the heart of the argument against flavors being the
> sole source of truth for a request. As cloud evolves, we keep packing more
> and more stuff into a concept that was originally meant to only divide up
> resources that came bundled together (CPU, RAM, and local disk). This
> hasn’t been a good solution for years, and the sooner we start accepting
> that a request can be much more complex than a flavor can adequately
> express, the better.
>
> If we have decided that remote volumes are a good thing (I don’t think
> there’s any argument there), then we should treat that part of the request
> as being as fundamental as a flavor. We need to make the scheduler smarter
> so that it doesn’t rely on flavor as being the only source of truth.
>
​+1​


>
> The first step to improving Nova is admitting we have a problem. :)
>
>
> -- Ed Leafe
>
>
>
>
>
>
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