[LiSA-Devel] Multi-engine questions

[Radu Rendec]

On Wed, 2013-06-05 at 20:05 +0300, Mihaela Alexandra Martinas wrote:

> I started analyzing how the multi-engine can be designed and a few
> questions popped up:
> 1. The user should have access to the cli of the switches that the
> multi-engine attempts to hide?(I know that the purpose for creating
> the multi-engine was that the user to access in a transparent manner
> the switches. Following this logic to access the clis shouldn't be
> necessary).

I would say "not necessarily", but it would be a "nice-to-have" feature,
though. In other words, if having this feature complicates the design
and bloats the code, then forget it.

> 2. Since the switches are on the same machine is it ok to communicate
> through sockets with the hidden switches?
> 
No, it doesn't make sense to use sockets if the switches are on the same
machine. But on the other hand, who says the switches are on the same
machine? Maybe you have a cluster of VM hosts, each of them having a
bridge+8021q lisa switch. And you want to deal with the whole cluster as
if it shared a single big switch.

If the design is based on sockets, it can easily scale to a distributed
system but can still be used on a single-machine system. By the way,
sockets on the loopback interface are really fast ;)

Radu


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