perfSONAR User Q&A and Other Discussion

[Shawn McKee <>]

Just to chime in, the Internet2 NTAC Synchronization group has recently been discussing PTP as well, and there was a meeting with Cisco on August 8 to discuss it.    One of the very interesting use-cases is for PTP synced hosts to measure WAN one-way delay that is sensitive to the queuing along the path.   To do that we would need perfSONAR to support PTP, when it is available.

Shawn

On Mon, Aug 14, 2023 at 3:32 PM Tim Chown <> wrote:

Hi,

We’re looking at deploying PTP in our R&E network initially to provide an alternative time source for our NTP service, but in the future we hope to embrace other uses.

I’m wondering what level of interest there is in the perfSONAR community for PTP support? The documentation talks of PTP, but the text was written a few years ago where the technology was relatively new, and expensive, to deploy:
https://docs.perfsonar.net/ntp_overview.html
https://docs.perfsonar.net/FAQ.html

But now PTP is rather more mature, and support in devices better, and most interestingly new Linux distributions include chronyd (which supports hardware timestamps) rather than ntpd.

Our interest would be in enchanted accuracy for one-way delay measurements, and thus the capability being added to owping.

Thoughts?

Tim--
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