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WP6 (formerly T1, now T2) is currently investigating how European NRENs support their user communities in making optimal use of their networks for large scale data transfers, including the use of Data Transfer Nodes (DTNs).

It would be very useful for us to get your feedback regarding your current practices and your interest to engage further with WP6 T1 on this topic (gn4-3-wp6-t1-dtn@lists.geant.org). Your feedback will be taken in consideration to redirect our future work.




GÉANT NREN Survey results

Survey presentation:

  • STF meeting, 22-23 Oct. 2019, Copenhagen (.pdf)

Questions:

Table of Contents
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Q1. Which






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Which (research) communities are you aware of that are moving large volumes of data across your network? 

(Answered: 21 Skipped: 9)

  • Filesender service is supported in most NRENs
  • AENEAS project (https://www.aeneas2020.eu/)
  • Federated European Science Data Center (ESDC) to support the

  • astronomical community in achieving the scientific goals of the Square
  • Kilometer Array (SKA)
•

  • on medical image data, SKA/LOFAR, Ancillary pricing for airline revenue

  • management, Agricultural Analysis based on Copernicus data)
  • Fiona Pacific data exchange PRP (https://
prp
ucsd.edu
  • org/); Petascale DTN

  • Project
  • Effort to improve data transfer performance between the DOE ASCR

  • HPC facilities at ANL, LBNL, ORNL, NCSA

  •  4.4TB of cosmology simulation data
Q2. Are



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Are there any success stories regarding data transfer that you can


report? What difficulties have you experienced?

(Answered: 17 Skipped: 13)

Most NRENs are doing small scale research projects regarding DTN deployment:

  • Success stories (1): OFAR,
eVLBI
  • E-VLBI and HEP (NIKHEF)
Q3. What
  • ; For LOFAR, the input rate is 250 Gbit/s, of which about 80 Gbit/s are international - Surfnet
    • E-VLBI experiments are supported with 30 Gbit/s to JIVE and for HEP 100 Gbit/s is provisioned to NIKHEF.
  • Success stories (2): Fast data transfer for Cancer research - IUCC (article link)

  • Success stories (3): Moving ESA traffic from peering with Deutsche Telecom to DFN/Geant-Path - ACOnet

  • Success stories (4): 100Gbit/s data transfer between Imperial College using Globus Connect endpoint - Janet

  • Success stories (5): LCHONE, LOFAR, HLC data transfer transfer data trails by 5 NRENs

The major difficulties:

  • Connecting the computers and internal lab network to the NREN infrastructure

  • Tuning of network parameters in the campus/LAN

  • Not using Science DMZ concept





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What problems do your communities report to you around data


transfers?

a

Q4. Which

(Answered: 19 Skipped: 11)

  • Performance and NOC issues
  • Firewall problems, DMZ
  • Local Campus issues (last mile)


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Which tools or methods do you use to measure the data transfers and


the data rates or the performance that can be achieved?

(Answered: 21 Skipped: 9)

data chart question 4Image Modified

Q5. What





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What services do you provide to your users to help them move data


across your network?

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Q6. Do

(Answered: 20 Skipped: 10)

data chart question 5Image Added


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Do you provide any other forms of assistance to your users to help


them achieve optimal data transfers across your network?

(Answered: 17 Skipped: 13)

data chart question 6Image Added

  • Other: Globus online





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Would you be willing to work with us (GN4-3 WP6) on improving data transfer infrastructures for the community?

(Answered: 19 Skipped: 11)

data chart question 8Image Added


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Additional comments related to data transfer that you could not express in the previous questions

(Answered: 4 Skipped: 26)

  • DTNs needs standardization of inter domain protocols. More experimenting internationally is needed.
  • The use of DTN and DMZ is not considered a solution for large data transfer in an environment in which capacity is lower than 100Gb for the end user access. In case capacity is not restricted, a set of tools is already available.
  • Usually the bottleneck is in users’ local network premises and in users’ applications.
  • Note also that some data cannot be moved from certified sites (biomedical).
  • As a general comment, the concept of high rate data transfer between nodes needs more dissemination and explanation (end node tuning, long fat pipes, etc).
  • We would like to know the best practices so that we follow them, so would like to know the results of this GN4 WP6 workgroup.