Speaker
Description
Much of the focus in international R&E networking lies with capacities and the ability to move large volumes of data in support of data-intensive science and international science collaborations.
While important, capacity is not everything. Latency is also critical in many scenarios. As a colleague recently put it “it’s not just megabytes it’s also milliseconds”. Use cases for low latency networking are many and varied, from haptic control, through distributed databases, to networked music performances. Different applications will have different sensitivity to latency and jitter.
There’s a wide range of tools for measuring latency, be that round trip time or one-way delay. The latter requires tight time synchronisation. In this BoF we aim to explore the trending latency requirements for R&E networks, the tools available for measurement, how these can allow expert users to detect different underlying issues, but also how measurements can best be aggregated and presented to non-technical users in a way that allows them to understand how latency is affecting their applications.
The BoF will include a small number of short talks to set the scene for subsequent discussion, and reserve at least half the allotted time for that discussion.
Topics to be introduced will include:
- Use cases, and their associated latency and jitter requirements
- Measurement tools, e.g., perfSONAR (OWAMP) meshes, GÉANT TimeMap, iperf2 “responsiveness under load” test
- Detecting issues, e.g., “bufferbloat”, latency spikes, WiFi issues, and routing changes affecting latency
- Aggregating measurements, e.g., through platforms such as MetrANOVA.
- Presenting measurements to non-technical users in the most meaningful way
The BoF will be chaired by Tim Chown (Jisc) with community subject matter experts introducing topics.
The discussion will consider gaps in the tools and approaches for reporting measurements, and explore potential collaboration to address identified gaps.
What will the TNC audience take away from your talk?
The audience will learn about use cases for low latency networking and current tools available to support network latency (and jitter) measurement.
Discussion aims to lead to identification of future collaboration opportunities for addressing gaps in our ability for expert users to understand potentially nuanced network issues but also to allow the presentation of measurements to application users in a meaningful way to allow them to understand how the network is impacting their application.
| Are you a first time speaker at TNC? | No |
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