Chad Norgan's guest appearances

Chad Norgan

OVS Orbit

Larry Peterson

Alex Ellis

Dave Hunt

Josh Bailey

Peter Phaal

Brian O'Connor

Jesse Gross

Greg Ferro

Nicholas Gray

Kyle Mestery

Chang Kim

Cloudbase Solutions

Dave Neary

Frederick Kautz

Simon Horman

OwlTail

      Interview with Chad Norgan of Rackspace, about use of Open vSwitch at      Rackspace over the years.           Topics include:              Chad's role at Rackspace and what he spends his time on.               Shifts in where he spends his time as Open vSwitch has matured.               Experiments with buying and writing SDN controllers and OpenFlow flows        at Rackspace, including a Ryu-based chassis controller.               SDN in two generations of Rackspace cloud, with NVP in the second        generation.               Tracing datapath flows using tools in Open vSwitch, using        “ovs-appctl ofproto/trace”, and the value of tracing for        debugging a running system.               Suggestions for improving “ovs-appctl ofproto/trace”.               Usefulness of Open vSwitch logging.               Significant performance improvements since earlier versions, such as        moving logging out of the main thread, megaflows, and eviction        handling.               Potential appliance use of DPDK, contrasted against downside for        hypervisors of losing a core.               Thoughts about importance of 64-byte packet performance in Rackspace        environment, and potential of eBPF work going on at Cisco to help with        that.               Performance history of Open vSwitch versions as perceived by Nicira and        Rackspace, and its evolution over time as Open vSwitch was exposed to        more and more diverse production use cases.               Open vSwitch decision for version 1.11 to completely rewrite everything        in terms of megaflows, to achieve reasonable performance in important        minority of cases.               Chad's presentation on Open vSwitch performance at the Open vSwitch 2014        Fall Conference.               Open vSwitch as the “incumbent” virtual switch.               Generating good representative traffic for testing.               Ixia hardware for predictable traffic generation, removing a variable        from the testing equation.               Desire for a physical hardware switch with the flexibility of Open        vSwitch, with P4 switches as a possible route there.               “ovsdb-tool -mmm show-log” as database debugging tool.              Chad can be contacted at @chadnorgan on Twitter, as      BeardyMcBeard on the freenode IRC      network           OVS Orbit is produced by Ben Pfaff.  The      intro and bumper music is Electro      Deluxe, featuring Gurdonack, copyright 2014 by My Free Mickey.  The      outro music is Girls like      you, featuring Thespinwires, copyright 2014 by Stefan Kartenberg.      All content is licensed under a Creative Commons Attribution 3.0      Unported (CC BY 3.0) license.    

Interview with Chad Norgan of Rackspace, about use of Open vSwitch at Rackspace over the years. Topics include: <ul> <li> Chad's role at Rackspace and what he spends his time on. </li> <li> Shifts in where he spends his time as Open vSwitch has matured. </li> <li> Experiments with buying and writing SDN controllers and OpenFlow flows at Rackspace, including a Ryu-based chassis controller. </li> <li> SDN in two generations of Rackspace cloud, with NVP in the second generation. </li> <li> Tracing datapath flows using tools in Open vSwitch, using “<code>ovs-appctl ofproto/trace</code>”, and the value of tracing for debugging a running system. </li> <li> Suggestions for improving “<code>ovs-appctl ofproto/trace</code>”. </li> <li> Usefulness of Open vSwitch logging. </li> <li> Significant performance improvements since earlier versions, such as moving logging out of the main thread, megaflows, and eviction handling. </li> <li> Potential appliance use of DPDK, contrasted against downside for hypervisors of losing a core. </li> <li> Thoughts about importance of 64-byte packet performance in Rackspace environment, and potential of eBPF work going on at Cisco to help with that. </li> <li> Performance history of Open vSwitch versions as perceived by Nicira and Rackspace, and its evolution over time as Open vSwitch was exposed to more and more diverse production use cases. </li> <li> Open vSwitch decision for version 1.11 to completely rewrite everything in terms of megaflows, to achieve reasonable performance in important minority of cases. </li> <li> Chad's presentation on Open vSwitch performance at the <a href="http://openvswitch.org/support/ovscon2014/" rel="nofollow" target="_blank">Open vSwitch 2014 Fall Conference</a>. </li> <li> Open vSwitch as the “incumbent” virtual switch. </li> <li> Generating good representative traffic for testing. </li> <li> Ixia hardware for predictable traffic generation, removing a variable from the testing equation. </li> <li> Desire for a physical hardware switch with the flexibility of Open vSwitch, with P4 switches as a possible route there. </li> <li> “<code>ovsdb-tool -mmm show-log</code>” as database debugging tool. </li> </ul> Chad can be contacted at <a href="https://twitter.com/chadnorgan" rel="nofollow" target="_blank">@chadnorgan</a> on Twitter, as BeardyMcBeard on the <a href="http://freenode.net" rel="nofollow" target="_blank">freenode</a> IRC network OVS Orbit is produced by <a href="mailto:blp@ovn.org">Ben Pfaff</a>. The intro and bumper music is <a href="http://dig.ccmixter.org/files/myfreemickey/48180" rel="nofollow" target="_blank">Electro Deluxe</a>, featuring Gurdonack, copyright 2014 by My Free Mickey. The outro music is <a href="http://dig.ccmixter.org/files/JeffSpeed68/44932" rel="nofollow" target="_blank">Girls like you</a>, featuring Thespinwires, copyright 2014 by Stefan Kartenberg. All content is licensed under a Creative Commons <a href="http://creativecommons.org/licenses/by/3.0/" rel="nofollow" target="_blank">Attribution 3.0 Unported (CC BY 3.0)</a> license.

OVS in Production, with Chad Norgan from Rackspace