When I tried, I used a single ovs-vsctl with all the patch ports as
arguments.
It was taking around 25 to 30 seconds for creating 5000 patch ports.
Thanks
Kapil
On 06-Jul-2016 5:29 AM, "Justin Pettit" <jpet...@ovn.org> wrote:
>
> > On Jul 4, 2016, at 4:50 AM, Levente Csikor <csi...@tmit.bme.hu> wrote:
> >
> > Hi,
> >
> > I did not find any documented limit about the number of patchports, so I
> wrote a simple script, which adds a predefined number of patchports and
> some dummy rules into the flow tables to actually have some reason for the
> whole stuff.
> >
> > First, I tried to add 100 and 1000 patchports between two OVS bridges.
> It was feasible, but took some time.
> > Then I tried with 10000 patchports, but I couldn't wait until it
> finished. After 1000 patchports, the adding procedure became slower and
> slower, so I killed the whole process (after a couple of thousands
> patchports the time OVS required for setting up one patchport was around a
> couple of seconds).
>
> This would be surprising to me. How did you add the ports? If you just
> ran a bunch of ovs-vsctl commands, it can take that long, but it shouldn't
> if you add them in a single transaction. From the FAQ:
>
> -=-=-=-=-=-=-=-=-=-
>
> Q: I want to add thousands of ports to an Open vSwitch bridge, but
> it takes too long (minutes or hours) to do it with ovs-vsctl. How
> can I do it faster?
>
> A: If you add them one at a time with ovs-vsctl, it can take a long
> time to add thousands of ports to an Open vSwitch bridge. This is
> because every invocation of ovs-vsctl first reads the current
> configuration from OVSDB. As the number of ports grows, this
> starts to take an appreciable amount of time, and when it is
> repeated thousands of times the total time becomes significant.
>
> The solution is to add the ports in one invocation of ovs-vsctl (or
> a small number of them). For example, using bash:
>
> ovs-vsctl add-br br0
> cmds=; for i in {1..5000}; do cmds+=" -- add-port br0 p$i"; done
> ovs-vsctl $cmds
>
> takes seconds, not minutes or hours, in the OVS sandbox environment.
> -=-=-=-=-=-=-=-=-=-
>
> --Justin
>
>
> _______________________________________________
> discuss mailing list
> discuss@openvswitch.org
> http://openvswitch.org/mailman/listinfo/discuss
>
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