{"id":1074,"date":"2026-09-09T19:25:47","date_gmt":"2026-09-09T19:25:47","guid":{"rendered":"https:\/\/ppc.mit.edu\/t2\/?p=1074"},"modified":"2026-09-09T19:25:48","modified_gmt":"2026-09-09T19:25:48","slug":"mit-tier-2-report-sep-9-2026","status":"publish","type":"post","link":"https:\/\/ppc.mit.edu\/t2\/?p=1074","title":{"rendered":"MIT Tier-2 Report &#8211; Sep. 9 2026"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">We had problems with XRootD SAM probes sporadically failing over the period of 4 days. At the same time we observed significantly increased incoming network traffic. We do not fully understand the root cause of a problem, investigating. <\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"351\" data-id=\"1069\" src=\"https:\/\/ppc.mit.edu\/t2\/wp-content\/uploads\/2026\/09\/Screenshot-2026-09-09-at-8.45.50-AM-1024x351.png\" alt=\"\" class=\"wp-image-1069\" srcset=\"https:\/\/ppc.mit.edu\/t2\/wp-content\/uploads\/2026\/09\/Screenshot-2026-09-09-at-8.45.50-AM-1024x351.png 1024w, https:\/\/ppc.mit.edu\/t2\/wp-content\/uploads\/2026\/09\/Screenshot-2026-09-09-at-8.45.50-AM-300x103.png 300w, https:\/\/ppc.mit.edu\/t2\/wp-content\/uploads\/2026\/09\/Screenshot-2026-09-09-at-8.45.50-AM-768x263.png 768w, https:\/\/ppc.mit.edu\/t2\/wp-content\/uploads\/2026\/09\/Screenshot-2026-09-09-at-8.45.50-AM.png 1390w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"326\" data-id=\"1070\" src=\"https:\/\/ppc.mit.edu\/t2\/wp-content\/uploads\/2026\/09\/Screenshot-2026-09-09-at-8.46.37-AM-1024x326.png\" alt=\"\" class=\"wp-image-1070\" srcset=\"https:\/\/ppc.mit.edu\/t2\/wp-content\/uploads\/2026\/09\/Screenshot-2026-09-09-at-8.46.37-AM-1024x326.png 1024w, https:\/\/ppc.mit.edu\/t2\/wp-content\/uploads\/2026\/09\/Screenshot-2026-09-09-at-8.46.37-AM-300x96.png 300w, https:\/\/ppc.mit.edu\/t2\/wp-content\/uploads\/2026\/09\/Screenshot-2026-09-09-at-8.46.37-AM-768x245.png 768w, https:\/\/ppc.mit.edu\/t2\/wp-content\/uploads\/2026\/09\/Screenshot-2026-09-09-at-8.46.37-AM.png 1518w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/figure>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-2 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"396\" data-id=\"1071\" src=\"https:\/\/ppc.mit.edu\/t2\/wp-content\/uploads\/2026\/09\/Screenshot-2026-09-09-at-8.49.10-AM-1024x396.png\" alt=\"\" class=\"wp-image-1071\" srcset=\"https:\/\/ppc.mit.edu\/t2\/wp-content\/uploads\/2026\/09\/Screenshot-2026-09-09-at-8.49.10-AM-1024x396.png 1024w, https:\/\/ppc.mit.edu\/t2\/wp-content\/uploads\/2026\/09\/Screenshot-2026-09-09-at-8.49.10-AM-300x116.png 300w, https:\/\/ppc.mit.edu\/t2\/wp-content\/uploads\/2026\/09\/Screenshot-2026-09-09-at-8.49.10-AM-768x297.png 768w, https:\/\/ppc.mit.edu\/t2\/wp-content\/uploads\/2026\/09\/Screenshot-2026-09-09-at-8.49.10-AM.png 1055w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"398\" data-id=\"1072\" src=\"https:\/\/ppc.mit.edu\/t2\/wp-content\/uploads\/2026\/09\/Screenshot-2026-09-09-at-8.49.36-AM-1024x398.png\" alt=\"\" class=\"wp-image-1072\" srcset=\"https:\/\/ppc.mit.edu\/t2\/wp-content\/uploads\/2026\/09\/Screenshot-2026-09-09-at-8.49.36-AM-1024x398.png 1024w, https:\/\/ppc.mit.edu\/t2\/wp-content\/uploads\/2026\/09\/Screenshot-2026-09-09-at-8.49.36-AM-300x117.png 300w, https:\/\/ppc.mit.edu\/t2\/wp-content\/uploads\/2026\/09\/Screenshot-2026-09-09-at-8.49.36-AM-768x298.png 768w, https:\/\/ppc.mit.edu\/t2\/wp-content\/uploads\/2026\/09\/Screenshot-2026-09-09-at-8.49.36-AM.png 1055w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>We had problems with XRootD SAM probes sporadically failing over the period of 4 days. At the same time we observed significantly increased incoming network traffic. We do not fully understand the root cause of a problem, investigating.<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[12],"class_list":["post-1074","post","type-post","status-publish","format-standard","hentry","category-report","tag-weekly"],"_links":{"self":[{"href":"https:\/\/ppc.mit.edu\/t2\/index.php?rest_route=\/wp\/v2\/posts\/1074","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ppc.mit.edu\/t2\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ppc.mit.edu\/t2\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ppc.mit.edu\/t2\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/ppc.mit.edu\/t2\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1074"}],"version-history":[{"count":2,"href":"https:\/\/ppc.mit.edu\/t2\/index.php?rest_route=\/wp\/v2\/posts\/1074\/revisions"}],"predecessor-version":[{"id":1076,"href":"https:\/\/ppc.mit.edu\/t2\/index.php?rest_route=\/wp\/v2\/posts\/1074\/revisions\/1076"}],"wp:attachment":[{"href":"https:\/\/ppc.mit.edu\/t2\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1074"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ppc.mit.edu\/t2\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1074"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ppc.mit.edu\/t2\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1074"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}