openstack team mailing list archive

[andi abes <andi.abes@xxxxxxxxx>]

On Sun, Feb 19, 2012 at 8:57 PM, Ed Leafe <ed.leafe@xxxxxxxxxxxxx> wrote:

> On Feb 19, 2012, at 12:53 PM, Mark Washenberger wrote:
>
> > For this reason, whatever name we choose I would hope we prefix it with
> "compute-" (i.e. compute-zone or compute-cell) so that we aren't letting
> language trick us out of some of our better implementation options, such as
> allowing deployers to scale compute, volume, network, and api resources
> separately.
>
>         I certainly don't want to preclude implementation options, and
> like the clarification that this is an issue of scaling compute, but I have
> two problems with the use of a prefix. First, it indirectly implies that
> scaling other entities would be done in the same manner: e.g., that an
> api-cell would have its resources independently deployed and with the
> inter-cell communication design as compute-cell. If the desired outcome is
> that we encourage different entities to implement their scaling
> independently and in the best manner for that entity, having a common name
> would seem to encourage the opposite.
>
>        Second, it just seems cumbersome. We should ensure that
> documentation about cells is clear that this is a way of scaling compute,
> but for referring to them in code and in discussion, a simple name like
> 'zone' or 'cell' is simpler and cleaner.
>
>
> I've seen folks confuse swift zones with nova zones (the old version). The
confusion led to assuming that swift zones are optional, and that nova
zones somehow solve HA problems.... (talk about a mishmash of concepts)

Adding clarity for *users* around the fact that cells are different in the
context of nova compute vs any other context where the same term is used is
a net plus imho.... so I agree that in the code we could use the "short"
version.
But I'd really like user/deployer facing locations (e.g. docs, flag files,
API calls etc) be more explicit about what variant of "cell" is being
referred to, and use compute-cell.




> -- Ed Leafe
>
>
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