[ovs-discuss] OVS megaflows

Joe Stringer joe at ovn.org
Mon Jul 24 19:58:56 UTC 2017

On 23 July 2017 at 06:37, Sara Gittlin <sara.gittlin at gmail.com> wrote:
> Hello,
> I understand that there is a support for megaflows in the kernel and netlink.
> I also understand that there is no megaflow implementation in ofproto.
> i.e. there is no implementation of compressing (if possible) all flows
> in ofproto table to megaflows and installing it in the datapath. is
> that correct ?

That's right - rather than pre-populating a representation of the
entire OpenFlow state, the ofproto-dpif implementation uses an
"upcall" model where the datapath acts as a cache for forwarding
behaviour, and the cache is populated on-demand as traffic arrives.

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