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Tuesday, March 15 • 3:05pm - 3:45pm
Exploration of Large Scale Virtual Networks - David Wilder, IBM

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IBM recently showcased a system running 10,000 docker containers on a single IBM Power system. To network all those containers we need to create a virtual network that supports thousands of endpoints. How will virtual networks of this scale perform? How will they break?

We built virtual networks of varying scale and tested them as we would have tested physical networks, by measuring sustained throughput and latency. Physical networks are limited by I/O bandwidth. Container to container traffic within a host is bounded by available CPU resource. Available network bandwidth becomes a function of available CPU cycles, CPU cycles that must be shared with applications. This is a key factor when sizing large scale docker systems.

In this presentation I will describe how we performed this analysts, the problems we encountered and the approaches used to solve them.

Speakers
DW

David Wilder

IBM
I have been working in the IBM Linux Technology Center for the past 10 years. My focus has been diverse including Linux networking, serviceability and embedded systems. I started working with Docker and experimenting with large virtual networks about a year ago. In 2007 I presented a paper at OLS on a Linux Driver Tracing Interface.


Tuesday March 15, 2016 3:05pm - 3:45pm
Grand Ballroom D Santa Clara Convention Center