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If OVN chooses not to support VLANs, we will still need the current OVS
reference anyway so it definitely won't be wasted work.

On Thu, Feb 26, 2015 at 2:56 AM, Miguel Angel Ajo Pelayo <
majopela at redhat.com> wrote:

>
> Sharing thoughts that I was having:
>
> May be during the next summit it’s worth discussing the future of the
> reference agent(s), I feel we’ll be replicating a lot of work across
> OVN/OVS/RYU(ofagent) and may be other plugins,
>
> I guess until OVN and it’s integration are ready we can’t stop, so it makes
> sense to keep development at our side, also having an independent plugin
> can help us iterate faster for new features, yet I expect that OVN will be
> more fluent at working with OVS and OpenFlow, as their designers have
> a very deep knowledge of OVS under the hood, and it’s C. ;)
>
> Best regards,
>
> On 26/2/2015, at 7:57, Miguel Ángel Ajo <majopela at redhat.com> wrote:
>
> On Thursday, 26 de February de 2015 at 7:48, Miguel Ángel Ajo wrote:
>
>  Inline comments follow after this, but I wanted to respond to Brian
> questionwhich has been cut out:
> We’re talking here of doing a preliminary analysis of the networking
> performance,before writing any real code at neutron level.
>
> If that looks right, then we should go into a preliminary (and orthogonal
> to iptables/LB)implementation. At that moment we will be able to examine
> the scalability of the solutionin regards of switching openflow rules,
> which is going to be severely affectedby the way we use to handle OF rules
> in the bridge:
>    * via OpenFlow, making the agent a “real" OF controller, with the
> current effort to use      the ryu framework plugin to do that.   * via
> cmdline (would be alleviated with the current rootwrap work, but the former
> one     would be preferred).
> Also, ipset groups can be moved into conjunctive groups in OF (thanks Ben
> Pfaff for theexplanation, if you’re reading this ;-))
> Best,Miguel Ángel
>
>
> On Wednesday, 25 de February de 2015 at 20:34, Tapio Tallgren wrote:
>
> Hi,
>
> The RFC2544 with near zero packet loss is a pretty standard performance
> benchmark. It is also used in the OPNFV project (
> https://wiki.opnfv.org/characterize_vswitch_performance_for_telco_nfv_use_cases
> ).
>
> Does this mean that OpenStack will have stateful firewalls (or security
> groups)? Any other ideas planned, like ebtables type filtering?
>
> What I am proposing is in the terms of maintaining the statefulness we
> have nowregards security groups (RELATED/ESTABLISHED connections are
> allowed back on open ports) while adding a new firewall driver working only
> with OVS+OF (no iptables or linux bridge).
>
> That will be possible (without auto-populating OF rules in oposite
> directions) due to
> the new connection tracker functionality to be eventually merged into ovs.
>
>
> -Tapio
>
> On Wed, Feb 25, 2015 at 5:07 PM, Rick Jones <rick.jones2 at hp.com> wrote:
>
> On 02/25/2015 05:52 AM, Miguel Ángel Ajo wrote:
>
> I’m writing a plan/script to benchmark OVS+OF(CT) vs
> OVS+LB+iptables+ipsets,
> so we can make sure there’s a real difference before jumping into any
> OpenFlow security group filters when we have connection tracking in OVS.
>
> The plan is to keep all of it in a single multicore host, and make
> all the measures within it, to make sure we just measure the
> difference due to the software layers.
>
> Suggestions or ideas on what to measure are welcome, there’s an initial
> draft here:
>
> https://github.com/mangelajo/ovs-experiments/tree/master/ovs-ct
>
>
> Conditions to be benchmarked
>
>     Initial connection establishment time
>     Max throughput on the same CPU
>
> Large MTUs and stateless offloads can mask a multitude of path-length
> sins.  And there is a great deal more to performance than Mbit/s. While
> some of that may be covered by the first item via the likes of say netperf
> TCP_CRR or TCP_CC testing, I would suggest that in addition to a focus on
> Mbit/s (which I assume is the focus of the second item) there is something
> for packet per second performance.  Something like netperf TCP_RR and
> perhaps aggregate TCP_RR or UDP_RR testing.
>
> Doesn't have to be netperf, that is simply the hammer I wield :)
>
> What follows may be a bit of perfect being the enemy of the good, or
> mission creep...
>
> On the same CPU would certainly simplify things, but it will almost
> certainly exhibit different processor data cache behaviour than actually
> going through a physical network with a multi-core system.  Physical NICs
> will possibly (probably?) have RSS going, which may cause cache lines to be
> pulled around.  The way packets will be buffered will differ as well.  Etc
> etc.  How well the different solutions scale with cores is definitely a
> difference of interest between the two sofware layers.
>
>
>
> Hi rick, thanks for your feedback here, I’ll take it into consideration,
> specially about the small packet pps measurements, and
> really using physical hosts.
>
> Although I may start with an AIO setup for simplicity, we should
> get more conclusive results from at least two hosts and decent NICs.
>
> I will put all this together in the document, and loop you in for review.
>
> rick
>
>
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>
>
> --
> -Tapio
>
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>
> Miguel Angel Ajo
>
>
>
>
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-- 
Kevin Benton
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