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Question about unstable power and probe
by Anurag Bhatia 27 Sep '15

27 Sep '15

Hello everyone! I have recently deployed a probe in a place where there's unstable power. Probe is rebooting like 4-5 times a day and unlikely power would be fixed in near future. I was wondering if it's safe for probe at all. Does anyone has experience with 4-5 reboots a day with probe? Will probe sustain it or better I just disconnect it and rather wait for power to become stable? Curious to hear your experiences. Thanks. -- Anurag Bhatia anuragbhatia.com PGP Key Fingerprint: 3115 677D 2E94 B696 651B 870C C06D D524 245E 58E2

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Save the date: RIPE Atlas Hackathon - 14-15 November - Bucharest
by Vesna Manojlovic 25 Sep '15

25 Sep '15

Dear all, It’s official: we will hold a new RIPE Atlas hackathon on the weekend before RIPE 71 in Bucharest. Join us, along with network operators and software developers from the Internet community, to work on RIPE Atlas tools. You'll have the chance to work alongside RIPE Atlas developers, meet others in your field, and exchange knowledge and experience. All source code developed during the hackathon will be publicly licensed and available on GitHub, and will be free for the entire community to use. Details: Date: 14-15 November 2015 Time: Saturday 09:00-19:00, Sunday 09:00-21:00 (including party) Location: JW Marriott Bucharest Grand Hotel, Bucharest, Romania We are looking for sponsors! Is your organisation interested in supporting our efforts? Please email me promptly and directly – thank you! Finally, stay tuned - this is a pre-announcement. We will publish more details, along with the application form, early next week. I look forward to seeing you there! Regards, Vesna

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New on RIPE Labs: Time Travel with RIPE Atlas
by Vesna Manojlovic 25 Sep '15

25 Sep '15

Dear colleagues, Please find another new RIPE Atlas related article on RIPE Labs: RIPE Atlas users can now use a new feature on the maps to travel back in time: https://labs.ripe.net/Members/suzanne_taylor_muzzin/ripe-atlas-time-travel-… Kind regards, Vesna

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Latest three RIPE Labs articles about RIPE Atlas
by Vesna Manojlovic 24 Sep '15

24 Sep '15

Dear colleagues, there have been many new articles published on RIPE Labs: about RIPE Atlas features, using RIPE Atlas data for analysis, etc. Please find the info about the latest three in this email, and many more here: https://labs.ripe.net/atlas Regards, Vesna Looking at France-IX with RIPE Atlas and RIS, by Emile Aben Sep 24, 2015 10:09 AM This article describes our recent collaborations with France-IX on collecting data plane and control plane Internet data with RIPE Atlas and the RIPE NCC's Routing Information Service (RIS): https://labs.ripe.net/Members/emileaben/looking-at-france-ix-with-ripe-atla… New RIPE Atlas Tool: LatencyMON, by Massimo Candela Sep 23, 2015 10:10 AM LatencyMON is a new RIPE Atlas web application that you can use to easily visualise and compare multiple latency trends collected by groups of RIPE Atlas probes. https://labs.ripe.net/Members/massimo_candela/new-ripe-atlas-tool-latencymon Checking your Internet Connectivity with RIPE Atlas Anchors, by Stéphane Bortzmeyer Sep 14, 2015 05:05 PM If you monitor your external Internet connectivity, you may wonder which machine is the best to ping. Hesitate no more - you can use RIPE Atlas anchors as landmarks. https://labs.ripe.net/Members/stephane_bortzmeyer/checking-your-internet-co…

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NIX.CZ (Czech Republic) has joined RIPE Atlas anchors
by Michela Galante 24 Sep '15

24 Sep '15

Dear RIPE Atlas users, We're happy to announce that another RIPE Atlas anchor has joined the network and is now available as a target for probe hosts conducting their own user-defined measurements. The new anchor is called cz-prg-as6881 and it is hosted by NIX.CZ in Prague, Czech Republic. Anchoring measurements (ping, ping6, traceroute and traceroute6) are scheduled towards this anchor from all the other anchors as well as several hundred probes, providing a continual overview of regional reachability. Results of these measurements are available as raw data in JSON format, and visualised on the map and "seismograph" with many configurable features. You can access the anchoring measurements for all anchors at: https://atlas.ripe.net/anchors/list/ Learn more about RIPE Atlas anchors at: https://atlas.ripe.net/about/anchors/ Thank you for participating in RIPE Atlas! Kind Regards, RIPE Atlas Team atlas(a)ripe.net

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Downloading ad-hoc Atlas measurements as JSON
by Jonathan Brewer 24 Sep '15

24 Sep '15

Hi All, One of my current frustrations is that when downloading ad-hoc Atlas measurements, the file name is always the same: "RIPE-Atlas-measurement.json". This is unfortunate. It would be great if the web server would by default call this measurement by its ID. Anyone else experiencing this problem? Regards, Jon

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Maintenance works today
by Robert Kisteleki 24 Sep '15

24 Sep '15

Dear All, We'll carry out maintenance work on the core RIPE Atlas infrastructure today, approximately between 10-11h Amsterdam time (8-9 UTC). This will also affect the API/UI, most likely resulting in failed API calls or web page loads. Excuses for the inconvenience. Regards, Robert Kisteleki

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RIPE Atlas Tools and Python versions
by Daniel Quinn 24 Sep '15

24 Sep '15

As some of you may already know, we’ve been working on a new command-line toolkit that will let you do nifty things like: * List measurement and probe metadata * Generate reports from measurement results * Stream measurement results It’s coming along quite nicely, but I’m running into just too many cases where support for Python 2.6 is (a) making my job harder, and (b) making my code uglier. Given that (a) means I spend more time fixing compatibility rather than adding features and (b) just makes me sad, I wanted to ask the community how important Python 2.6 is to you. So here’s the question: Of those of you who would find such a tool interesting/useful, how many of you *only* have access to a computer running Python 2.6? Such systems include CentOS distributions earlier than 7, and corresponding RedHat Enterprise systems. If you’re using Debian, or Ubuntu, you should already have 2.7 by default, and if you’re on Gentoo or Arch, you probably have both 2.7 and 3.5 already. I understand that Apple’s OSX is running 2.7 these days as well. If I don’t get a wave of messages about how very important 2.6 is to your collective health and wellbeing, I’m going to consider this a non-issue and drop support for 2.6. Thanks for your input everyone :-)

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Friday's events on RIPE Atlas
by Romeo Zwart 23 Sep '15

23 Sep '15

Dear all, Here is a description of the events that took place last Friday and some 'lessons learned' that we took away from it. The high level summary of events is that an Atlas user was authorised to create an extreme number of measurements involving a large number of probes. This effectively overloaded the back-end machinery in various different ways. Even though this event could only happen because of the exception in resource use limits, we have implemented workarounds and countermeasures to avoid a repetition in future, and we will be investigating some of the more fundamental issues in the coming period. More information is available below for those interested. Observations: - Problems started shortly before 11am when one of the Atlas users created a large number of new measurements each involving all available probes. The user had been given an exceptional amount of credits as part of a special experiment. Therefore the normal limitations on the impact any individual user can have on the system were not active when the measurements were created and activated. - The results of the newly created measurements put a lot of strain on the measurement scheduler, which triggered our interest. After some investigation the cause of the overload was identified and the related measurements were ended. - However, by this time the majority of results, up to that moment, had already reached our queuing servers and the consumers were already ingesting the results into our Hadoop storage platform. - At this phase we discovered a capacity problem with the process that consumes the Atlas results, so we doubled the capacity of that component on the fly. - This exposed the next bottleneck in our platform in the form of an accumulation of the created results on a very small number of processing nodes. Normally the incoming measurement results are distributed over several storage nodes, so this strongly reduced the consumption rate of new data. - A third factor that contributed was the fact that, in attempt to curb growth of the Atlas data, we have migrated the Atlas data sets to a more efficient compression algorithm earlier in the year. This saved us some 40-50% of storage space for the Atlas data, at the expense of some compute power. Under normal circumstances, even at high loads, this compute power is abundantly available on the storage cluster. Under the specific circumstances of last Friday's events, it turned out that the change of the compression algorithm had increased processing time for some Hadoop system tasks by up to a factor of 8, which had a direct impact on the data consumption speed. Immediate actions taken: - Removed special privileges of the end-user in question - Added capacity to the Atlas consumer processes - Returned (temporarily) to less efficient compression on the Atlas data sets. Lessons learned and further planned action: - Granting special privileges for some of the Atlas users needs (even) more attention than it already receives. - We need to better communicate "best practices" to these power users so they can use their extra allowances responsibly. - Improved compression of Atlas data has decreased our storage demands but also decreased our processing capacity. This needs further investigation to find the optimum configuration. - Investigate possibilities to better spread incoming results over more worker nodes (reduce hotspots). - Investigate and quantify reasonable boundaries of scalability of the whole system, to guide the limits for granting credits to end users. Kind regards, Romeo Zwart

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Booking.com IT Services, Singapore has joined RIPE Atlas anchors
by Valentino Dijkstra 22 Sep '15

22 Sep '15

Dear RIPE Atlas users, We're happy to announce that another RIPE Atlas anchor has joined the network and is now available as a target for probe hosts conducting their own user-defined measurements. The new anchor is called sg-sin-as43996 and is hosted by Booking.com <http://booking.com/> IT Services, Singapore. Anchoring measurements (ping, ping6, traceroute and traceroute6) are scheduled towards this anchor from all the other anchors as well as several hundred probes, providing a continual overview of regional reachability. Results of these measurements are available as raw data in JSON format, and visualised on the map and "seismograph" with many configurable features. You can access the anchoring measurements for all anchors at: https://atlas.ripe.net/anchors/list/ <https://atlas.ripe.net/anchors/list/> Learn more about RIPE Atlas anchors at: https://atlas.ripe.net/about/anchors/ <https://atlas.ripe.net/about/anchors/> Thank you for participating in RIPE Atlas! Kind regards, RIPE Atlas Team RIPE NCC atlas(a)ripe.net <mailto:atlas@ripe.net>

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