On Wed, Aug 27, 2014 at 10:26:14AM +0900, Simon Horman wrote: > On Fri, Aug 22, 2014 at 08:30:08AM -0700, Ben Pfaff wrote: > > On Fri, Aug 22, 2014 at 09:19:41PM +0900, Simon Horman wrote: > > > I have been working with Netronome on examining the possibilities of > > > providing (richer) load balancing facilities in Open vSwitch. > > > > > > It seems to us that the current select group provides for some load > > > balancing functionality. And that in particular the way that it is > > > implemented in Open vSwitch provides L2 destination load balancing (it > > > hashes on the destination ethernet address). Our ideas so fare are as > > > follows: > > > > > > 1. Provide a richer and ideally extendible select group in the > > > form of an OpenFlow extension to groups. > > > > > > * Allow the fields used to be selected. > > > > > > In the case of a hash this would be the fields that are hashed. > > > > > > An implication of this is that the pre-requisites of these > > > fields would need to be present in the flow's match. > > > In masking of the fields would be allowed but not > > > required for fields whose TLVs allow masking. > > > > > > * Allow designation of the selection method used. > > > > > > For example hash. > > > > > > * Allow passing a parameter to the selection method. > > > > > > For example an initial value key for hashes. > > > > There is an outstanding patch on this topic already: > > http://patchwork.openvswitch.org/patch/5424/ > > I have no particular objections to that change, though I have > not thought about it deeply. However, I think its more valuable > in the long run to make select groups configurable rather than > tweaking what would be the default setting. > > > It sounds reasonable to make select groups configurable. The way to do > > that would be to implement the OpenFlow 1.5 (draft) proposal to add > > properties to groups and group buckets, which is filed in the ONF JIRA > > as EXT-350. > > I'm happy to look at implementing EXT-350 (which I now have access to :) > however it seems to me that while it makes groups more configurable > it does not address the ability to configure the selection method.
Why not? Part of the configuration can be the selection method. > What we would like to do is to provide something generally useful > which may be used as appropriate to: I'm going to skip past these ideas, which do sound interesting, because I think that they're more for Pravin and Jesse than for me. I hope that they will provide some reactions to them. > ---------------------------------------------------------------------- > Proposal: Proposal for enhanced select groups > Version: 0.0.1 The proposal seems reasonable on its own but given that EXT-350 allows a standardized way to add group configuration extension I am not sure it makes sense to add a specialized way to do that. _______________________________________________ dev mailing list dev@openvswitch.org http://openvswitch.org/mailman/listinfo/dev
