We did make changes to the version of openvswitch that we were using. What is the underlying infrastructure?
--- ERIK JACOBS PRINCIPAL TECHNICAL MARKETING MANAGER, OPENSHIFT Red Hat Inc <https://www.redhat.com/> ejac...@redhat.com M: 646.462.3745 @: erikonopen <https://red.ht/sig> TRIED. TESTED. TRUSTED. <https://redhat.com/trusted> On Tue, Apr 18, 2017 at 5:06 AM, Roosemeyers Erik <erik.roosemey...@arxus.eu > wrote: > Hi Erik, > > > > Thx for picking up my questions… > > > > We’re using OCP v3.1 and the openshift-sdn. > > > > Both IP and DNS name of containers are used in the tests. > > > > If it can help, I can include more detailed test results in various > scenarios. > > > > Do you think a newer version of ocp will improve on this ? thx ! > > > > Kind regards, > > Erik > > > > *From:* Erik Jacobs [mailto:ejac...@redhat.com] > *Sent:* maandag 10 april 2017 22:45 > *To:* Roosemeyers Erik <erik.roosemey...@arxus.eu> > *Cc:* dev@lists.openshift.redhat.com > *Subject:* Re: high tcp retransmissions between pods on same openshift > node > > > > Hi Erik, > > > > Are you using openshift-sdn or multitenant-sdn or something else? Are you > running OpenShift Container Platform 3.1? > > > > Are you just communicating with the pod IP directly? > > > --- > > *ERIK** JACOBS* > > PRINCIPAL TECHNICAL MARKETING MANAGER, OPENSHIFT > > Red Hat Inc <https://www.redhat.com/> > > ejac...@redhat.com M: 646.462.3745 @: erikonopen > > <https://red.ht/sig> > > *TRIED. TESTED. TRUSTED.* <https://redhat.com/trusted> > > > > On Tue, Mar 28, 2017 at 4:27 AM, Roosemeyers Erik < > erik.roosemey...@arxus.eu> wrote: > > Hi all, > > > > I'm testing network connectivity (speed and reliability) on a OpenShift > cluster 3.1. > > > > I do this with 2 pods, each based on iperf3 Docker image. > > > > First pod starts iperf3 as server, other one as iperf3 client with: iperf3 > -c iperf3 -t 120 (iperf3 name of server pod). > > > > What I notice is high throughput but also big retransmission rates: > > eg. > > duration Transfer Bandwidth > Retransmissions (TCP) > > 0.00-120.00 sec 214 GBytes 15.3 Gbits/sec 170478 > > > > If the pods are on 2 different nodes, the retransmission rate is smaller > (as is throughput): > > > > duration Transfer Bandwidth > Retransmissions (TCP) > > 0.00-120.00 sec 22.6 GBytes 1.62 Gbits/sec 3627 > > > > What I was wondering - what causes this higher retransmission rates ? > (Mostly, it's a sign the are network problems but is it ?) > > > > (I did some other tests, like deploying the containers via the Docker > daemon onto 1 server. And even on a local laptop with only Docker daemon > installed - and I always saw these tcp retransmission rates...) > > > > > > Thanks in advance ! > > > > kind regards, > > Erik > > > _______________________________________________ > dev mailing list > dev@lists.openshift.redhat.com > http://lists.openshift.redhat.com/openshiftmm/listinfo/dev > > >
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