{"id":969,"date":"2017-03-05T09:22:09","date_gmt":"2017-03-05T17:22:09","guid":{"rendered":"https:\/\/ant.isi.edu\/blog\/?p=969"},"modified":"2020-10-19T09:45:27","modified_gmt":"2020-10-19T16:45:27","slug":"new-talk-collecting-and-visualizing-outages-over-the-long-haul-at-the-aims-workshop-2017","status":"publish","type":"post","link":"https:\/\/ant.isi.edu\/blog\/?p=969","title":{"rendered":"new talk \u201cCollecting and Visualizing Outages Over the Long Haul\u201d at the AIMS Workshop 2017"},"content":{"rendered":"<p>John Heidemann gave the talk \u201cCollecting and Visualizing Outages Over the Long Haul\u201d at CAIDA&#8217;s <a href=\"http:\/\/www.caida.org\/workshops\/aims\/1703\/\">Active Internet Measurement (AIMS) Workshop<\/a>&nbsp;in San Diego, California, USA on March&nbsp;2, 2017. &nbsp;Slides are available at <a href=\"http:\/\/www.isi.edu\/~johnh\/PAPERS\/Heidemann17b.pdf\">http:\/\/www.isi.edu\/~johnh\/PAPERS\/Heidemann17b.pdf<\/a>.<br \/>\nFrom the abstract:<\/p>\n<blockquote><p><figure id=\"attachment_971\" aria-describedby=\"caption-attachment-971\" style=\"width: 300px\" class=\"wp-caption alignright\"><a href=\"https:\/\/ant.isi.edu\/blog\/wp-content\/uploads\/2017\/03\/Heidemann17b_icon.png\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-971\" src=\"https:\/\/ant.isi.edu\/blog\/wp-content\/uploads\/2017\/03\/Heidemann17b_icon-300x226.png\" alt=\"\" width=\"300\" height=\"226\" srcset=\"https:\/\/ant.isi.edu\/blog\/wp-content\/uploads\/2017\/03\/Heidemann17b_icon-300x226.png 300w, https:\/\/ant.isi.edu\/blog\/wp-content\/uploads\/2017\/03\/Heidemann17b_icon-768x578.png 768w, https:\/\/ant.isi.edu\/blog\/wp-content\/uploads\/2017\/03\/Heidemann17b_icon.png 845w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><figcaption id=\"caption-attachment-971\" class=\"wp-caption-text\">Unmeasurable blocks over time, a challenge in long-haul outage measurement, from [Alwabel15a]<\/figcaption><\/figure>We have been collecting data about outages in the Internet since Oct. 2014. Our outage detection system, Trinocular, uses active probing from four sites to study about 4 million \/24 IPv4 address blocks. Long-duration measurements bring challenges that don&#8217;t occur in short observations. Most importantly, our target (&#8220;the Internet&#8221;) changes as we measure it, as new blocks come on-line, old blocks are reused in different ways, and ISPs observe and sometimes block our traffic. Our measurement platform also sees occasional hardware failures. Visualization can assist detection of these problems, allowing human perception to detect changes in data collection that have not previously been anticipated. This talk will discuss the challenges of long-term outage measurement and describe our new algorithm that scales to support clustering of 4M blocks and 3 months of observations for visualization.<br \/>\nOur visualization is joint work with Yuri Pradkin, and analysis of our long-term outages includes work with Abdulla Alwabel.<\/p><\/blockquote>\n<p>This talk draws on work from [<a href=\"http:\/\/www.isi.edu\/~johnh\/PAPERS\/Alwabel15a\">Alwabel15a<\/a>]. &nbsp;Data from this talk is available at <a href=\"https:\/\/ant.isi.edu\/datasets\/outage\/\">https:\/\/ant.isi.edu\/datasets\/outage\/<\/a>, and visualizations can be found at <a href=\"https:\/\/ant.isi.edu\/outage\/browse\/\">https:\/\/ant.isi.edu\/outage\/browse\/<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>John Heidemann gave the talk \u201cCollecting and Visualizing Outages Over the Long Haul\u201d at CAIDA&#8217;s Active Internet Measurement (AIMS) Workshop&nbsp;in San Diego, California, USA on March&nbsp;2, 2017. &nbsp;Slides are available at http:\/\/www.isi.edu\/~johnh\/PAPERS\/Heidemann17b.pdf. From the abstract: We have been collecting data about outages in the Internet since Oct. 2014. Our outage detection system, Trinocular, uses active [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[280],"tags":[54,34,71,157,58,67,8,22,10,44,41,45,68,170,49,57,36,38],"class_list":["post-969","post","type-post","status-publish","format-standard","hentry","category-presentations","tag-aims","tag-algorithms","tag-datasets","tag-impact","tag-isi","tag-lacrend","tag-lander","tag-measurement-systems","tag-network-datasets","tag-outage-detection","tag-predict","tag-reliability","tag-retro-future","tag-retrofuturebridge","tag-talks","tag-usc","tag-visualization","tag-workshop"],"_links":{"self":[{"href":"https:\/\/ant.isi.edu\/blog\/index.php?rest_route=\/wp\/v2\/posts\/969","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ant.isi.edu\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ant.isi.edu\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ant.isi.edu\/blog\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/ant.isi.edu\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=969"}],"version-history":[{"count":3,"href":"https:\/\/ant.isi.edu\/blog\/index.php?rest_route=\/wp\/v2\/posts\/969\/revisions"}],"predecessor-version":[{"id":1604,"href":"https:\/\/ant.isi.edu\/blog\/index.php?rest_route=\/wp\/v2\/posts\/969\/revisions\/1604"}],"wp:attachment":[{"href":"https:\/\/ant.isi.edu\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=969"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ant.isi.edu\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=969"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ant.isi.edu\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=969"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}