23.07.2015: eduPERT Monthly Call
eduPERT July Call: Dave Wilson, HEAnet Following the presentation we had, the slides and the recorded session can be found in the Documents section.
Wireless Crowedsourced Performance Verifiation and Measurement
Dave Wilson, HEAnet introduced to the subject Wireless Corwedsourced Performance Verification and Measurement, the expertise done at the TNC15 and the ongoing work on the GN4SA3T3 Wifimon task. Abstract: Scenario: A student calls their university IT helpdesk. "My internet is slow." Here are the steps to troubleshoot: 1: Send someone to the room to test the wifi after the lecture is already over and everyone has cleared out. 2: Give up. But there has to be a better way. We're exploring getting monitoring information not just from wifi probes dotted about campus, but from the users' devices themselves - and discovering what you can do when you do. We were 9 partizipants - we had a lively discussion about the analysis of log-files, the privacy to the end-user and network-administrator, collecting mechanism on relevant parameters and further steps or opportunities of "Wireless Crowedsourced Performance Verification and Measurements". ________________________________________________
18.06.2015: GEANT eduPERT Advanced Training
GEANT eduPERT advanced training : Brian Tierney (ESnet), Mary Hester (ESnet), Robert Stoy (DFN), Richard Hughes-Jones (DANTE), Trupti Kulkarni (DANTE), Antoine Delvaux (PSNC), Simon Leinen (SWITCH), Kurt Baumann (SWITCH) Following the presentation we had, the slides can be found in the Documents section.
GEANT eduPERT Advanced training
The GEANT eduPERT Advanced training, a part of the Performance U! is a follow up "train the trainers" tutorial held at the TNC15 in Porto. The aim of the training was to extend the knowledge in "performance measurement", how to do and using the according tools, iperf, bwctl, owamp and udpmon. ________________________________________________
10.06.2015: SQM (Service Quality Management) Update
eduPERT June Call: Pavle Vuletic, AMRES Following the presentation we had, the slides can be found in the Documents section.
Pavle Vuletic, AMRES introduced into the SQM Activities. This presentation was the last part of a trilorgy; perfSONAR, CMon and now SQM. He started with the the question "What is Service Quality Management ? ": Resource Performance Management (RPM) – provides insight into the network and network element performance and behavior (e.g. status of the interface, the amount of traffic passing through the interface, CPU load or similar). Service Quality Management (SQM) correlates network measurement data with the service information and gives it a specific meaning. Processes related to SLA verification and assurance used to check and verify key SLA parameters and customers experience. Increasingly important with the development of virtualized environments where multiple service instances, so share the same physical infrastructure ________________________________________________
18.03.2015: GEANT Cloud Activity
eduPERT March Call: Andres Steijaert, SURFnet, Activity Leader SA7 Following the presentation we had, the slides can be found in the Documents section.
Andres Steijaert introduce into the GEANT Cloud Activity on the GN3+ project. On his presentation he focused:
The NRENs have established a collaboration on cloud services inGEANT;
They have evolved our work from technical components, also include organizational
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18.02.2015: CMon Update
eduPERT February Call: Trupti Kulkarni, DANTE, the CMon Deployment Manager Following the presentation we had, the slides can be found in the Documents section.
Trupti Kulkarni, DANTE introduced to the CMon deployment, philosophy, vision and future steps. About CMon Service: How does this benefit users: ________________________________________________
04.12.2014: HPC Performance tools on the road to Exascale
eduPERT December Call: David Tur, Maria Isabel Gandia Following the presentation we had, the slides can be found in the Documents section.
HPC Performance tools on the road to Exascale
David and Maria, CSUC introduced to the topic HPC and performance measurement. They contiued on their own use cases.
Abstract: High Performance Computing is facing two challenges in the short
future: Big Data and Exascale Computing. This talk will be centered in the
Exascale, term that refers to computing systems capable of offering EXAFlop/s*
of performance. Exaflop computing will make a considerable impact on several
areas of engineering and applied sciences and the most powerful regions in the
world are racing to be the first to have a supercomputer able to achieve a
performance level of 1 ExaFflop/s. New architectures are emerging and also new
programming paradigms and performance tools will be necessary.
There is a huge collection of analysis and performance supercomputing tools on
the market and the selection of the most suitable is not trivial. There is a
wide number of performance problems which should be taken into account (disk
performance, I/O bottlenecks, network performance, load imbalance…) and the
selection of the tools must depend not only on the code or algorithms under
study but also on the machine architectures or the numerical and parallelisation
libraries. This talk will present a summary of the most-up-to-date selected tools
CSUC participates in the NUMEXAS European project and, together with HLRN
supercomputing center from Germany, is in charge of providing up-to-date HPC
resources including computers and adequate tools for program development to the
rest of the partners. CSUC leads the Work Package with title “Benchmarking,
Profiling and Hardware Optimization”. The objective of this WP is to evaluate
software developed in other WPs with regard of their performance and scaling on
the different HPC architectures
*Flop/s is a measure of performance used in computing which indicates the number
of FLoating-point Operations Per Second capable to be performed by a system.
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06.11.2014: perfSONAR update - what's new
eduPERT November Call: Roland Karch, FAU Following the presentation we had, the slides can be found in the Documents section.
Roland Kark, FAU, deployment manager of perfSONAR introduced to the topic. He explained the the old version the perfSONAR MDM (the GEANT deployment) and focused to the new one, pS a collaboration with the US-Development team. (perfSONAR-MDM <==> perfSONAR MERGER <==> pS) He pointed out that this collaboration with the US-Development team should allow us to transfer the knowledge asap into the GEANT community; to have a product at the end of GN4, Ph1 is the goal. Furhter more if we talk about perfSONAR, then we talk only about the pS ________________________________________________
18.09.2014: Performance Measurement with RIPE Atlas Probes
eduPERT September Call: Tim Kleefass, BelWue Following the presentation we had the slides can be found in the Documents section.
Performance Measurement with RIPE Atlas
Tim Kleefass introduced to the Use Case: Performance Measurement Performance problem between a remote network, in this case: Deutsche Telekom (DTAG/AS3320) a University connected to us (BelWü/as553) (Lot of the employees and students are connected via DTAG at home) We don’t have a direct connection to DTAG We changed the transit ISP to DTAG Everything seemed fined, traffic level, our VPN/GRE tunnels to schools, etc. But one University complained about IPSec VPN performance problems ________________________________________________
24.07.2014: Ceph vs Swift - Performance Evaluation on Smaller Cluster
eduPERT July Call: Presenter Vincenco Pii, ZHAW, Winterthur CH Following the presentation we had, the slides can be found in the Documents section.
Ceph vs SWIFT Performance Evaluation of smaller Cluster
The objective of this experiment/use case is to compare two different storage systems for the cloud (both Swift and Ceph can be used with OpenStack) with an object-based interface, with the intention of evaluating the performance of Ceph with respect to a system – Swift, that is considered to be very mature and counts already many production deployments. Important institutions or companies use Swift for their storage or as a basis on which their storage services are built (wikimedia, Disney, Spilgames, HP …). The storage cluster used for the comparison is a small one that could be seen in private deployments for limited storage needs or on experimental environments. This study aims at evaluating the differences that may arise when using the two services on such a scaled down cluster and which limiting factors should be taken into account when using distributed storage on small deployments. ________________________________________________
25.06.2014: Monitoring of ETH OAM in Inciga and Cacti
eduPERT June Call Following the presentation we had, the slides can be found in the Documents section.
Monitoring of Ethernet OAM in Incigna and Cacti
Eric introduced to the topic based on SURFnet use cases. He explained lively the functionality and the use of these tools. He showed that it is possible to implement simple OAM monitoring without spending too much resources. Further to have this available in our existing OSS environment, so that we did not have to invest in additional software, and that no additional software required for L2 monitoring, this saves time and resources when implementing Ethernet OAM. ______________________________________________________________________ 27.02.2014: APM DiscussioneduPERT February call Roundtable about APM and the possible role of eduPERT. Brian Nisbet gave a short introduction about the topic and the slides can be found in the Documents section. Here are links to some tools that were posted during the call:
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27.01.2014: Science DMZeduPERT January call: Happy new year! Following the abstract of the very interesting presentation we had and the slides can be found in the Documents section. Science DMZ - Jason Zurawski ESnet "Big Data", a recent area of emphasis meant to address the growing research capability of scientific disciplines, has caught many off guard. The exponential growth patterns, spanning areas from physics to medical research, stand to overwhelm the capabilities of many legacy infrastructures in the coming years. Network providers have a unique challenge in this space: How can the networks of today scale to meet the coming data demands, while remaining both safe and reliable? The Science DMZ network design paradigm combines three core concepts to deliver on the requirements of scientific network use:
This talk will outline the challenges in supporting data intensive science as identified by ESnet, and will highlight design and implementation best practices that are currently used around the world to best support the needs of operators and end users. |
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25.11.2013: EC Internet Monitoring StudyeduPERT November call Timur Friedman, professor at Sorbonne University gave an overview of the internet monitoring study organized by the EC. Timur is one of the people responsible for the study and he kindly accepted to participate and present at our call. You can read more about the study on the European Commission link. |
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28.10.2013: MonIPÊ ProjecteduPERT October call Alex Moura from RNP presented the MonIPÊ Project. This Brazilian project is about building a measurement service using small and low cost hardware like Rasperry Pi and Cuboxes. perfSONAR will be installed on the boxes and shipped to the end-users (campuses and universities). You can read more about this extremely interesting project, and the measurement tests that will be done, on the slides published in the Documents section. |
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24.09.2013: Tracebox and EC workshopHere is the recap of the eduPERT September call: Presentation from Gregory Detal. Gregory Detal is a researcher at Université catholique de Louvain in Belgium. He works together with Oliver Bonaventure on MPTCP, but during this call he presented his work on a new tool able to discover the presence of middleboxes on the path and their interference. The name of the presentation was "Detecting middlebox interference with tracebox" and here are the slides: Detecting middlebox interference with tracebox Extremely interesting work that can be very useful when troubleshooting performance issues. Many thanks to Gregory. The second part of the call was a round table to answer some of the key questions for the EC workshop that will take place on the 3rd and 4th October in Brussels. Main points coming from the discussion:
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21.08.2013: MPTCP and tracerouteDuring this call we had a presentation and a short demo. The presentation was given by Benno Overeinder from NLNlabs on MPTCP. He gave an overview of the protocol explaining how it works and which are the major problems when the protocol is used in real environments. The slides can be found here. There is also a new page on our KBpert about MPTCP - click here. During the second part a demo was given by Robert Stoy on my traceroute. The aim of the demo was to demonstrate that sometimes mtr can show loss on the network where there is actually none due to rate limiters, timeouts and cpu cycles sparing. |
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19.06.2013: virtual F2F meetingThis call was about the TNC F2F meeting, its outcome and what we would like to do in the future. The discussion was very alive and in the end we all agreed on how to proceed. Here is a brief report of the call. The main two points that were raised during the TNC F2F meeting were:
A first discussion about them took already place during the F2F in Maastricht but things were better defined during the call. The first decision we all agreed on was that we will focus more in doing outreach especially towards end user communities. This is something we have already started. In September eduPERT will hold a training at the EGI technical forum. Next possible communities are Eudat and PRACE. Second decision: we will not consider to do transatlantic troubleshooting at the moment because of lack of resources and because troubleshooting is in general a task of the local PERT team involved in the performance issue. |
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23.05.2013 May 2nd Virtual WorkshopIn this workshop Robert Stoy showed us how to install and use bwctl with iperf. The config files and a text file containing all the commands he used during the workshop can be found in the documents. |
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15.4.2013 April eduPERT phone callThe main topic of the call was happy eyeballs. The reason behind this choice was the idea of writing a new page in our KB as outcome of the call. So you will read the report of this part of the call in the page that will be written. In the meanwhile you can check this Keynote speech [1] that Geoff Huston gave last year at NORDUnet 2012. The presentation is very well done and it is not just about happy eyeballs but more around the entire concept of dual stack. The rest of the call was about eduPERT and SA4 in GN3plus. Last week the kick-off of the activity took place. These are the tasks in SA4 (Network Support Services):
During the kick-off every task leader gave a presentation about the current status of his task and the plan for the next year(s). For eduPERT current Status there are the points that I presented:
And for the next future:
General announcement: eduPERT F2F meeting at TNC2013 [2]
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27.2.2013 February eduPERT phone callIt was fun to discover the different uses and options that nuttcp provides. But before I start with the report I have an announcement. Considering the success of this call, we will have more sessions like this in the future. Bartek had this nice idea and he named it "virtual workshop". The virtual workshop will take place once every 2/3 months instead of the normal call. We will use tools or software and try to understand it together. Bartek will be in charge of it. Any topic coming from the community is more than welcome, you only have to send him an email with details. Now back to today's call! Here are the different options we tried using a server here at SWITCH and a server in Poznan.
This time we used my mac to send the traffic. On the main host On my mac What we saw was actually a stream of character on standard output of the host here at switch.
Very interesting and useful feature. It gives the possibility of shaping the traffic. Third party mode ran from my mac It's enough to have nuttcp running on two machine and have a third one to decide how to run and shape the traffic and collect statistic. |
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25.1.2013 January eduPERT phone callHere are the minutes! TF-NOC meeting: Bartek Gajda, Tim Kleefass and I attended the meeting. The slides of our presentations can be found here. TIP 2013:
Nuttcp: I came across the tool during the Network Performance Workshop at TIP. Very similar to iperf but with the very good feature of being stable when used with UDP traffic. We agreed on postponing this topic to the next call. The plan is to have more time in order to play and test the tool together setting server and client in different locations in Europe. Highlights from the talk about Perfsonar given by Domenico Vicinanza:
General announcement:
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30.11.2012 November eduPERT phone callParticipants: Bartek Gajda, Tim Kleefass, Simon Leinen, Ronald van der Pol, Alessandra Scicchitano, Robert Stoy.Apologized: Alex Gall, Chris Welti. Summary Introduction to PsPing:Bartek Gajda gave a very interesting presentation on this measurement tool. He made an introduction and showed how it concretely works, plus he also compared it with iperf. Bartek wrote a page about the tool on our PERTKB as well. The slides can be found here: PSNC_psping-for-edupert-vc-v1.pdf Bufferbloat:Simon Leinen presented how too big buffers can lead to congestion instead of performance improvement. His presentation touched the main points starting from the rfc 970, getting to CoDelpassing through Jim Getty's blog. The presentation was concluded with a short introduction to Cerowrt which is a project built on top of Openwrt to resolve the problem of bufferbloat. Right after a very interesting discussion followed on the meaning of bufferbloat in our networks and daily life, on whether it is or not an academic topic and so on. Bufferbloat on our PERTKB. Introduction to the new eduPERT portal:Overview of the new portal looking at all the sections. Discussion on what can be taken and what should be dropped. The new portal and the link to it will be made public by middle of the next week. General announcement:
The next phone call has been fixed for the 25th January 2013 at 10am CET. There won't be any phone call in December because of the Christmas vacation. |