{"id":249,"date":"2025-04-23T12:44:34","date_gmt":"2025-04-23T12:44:34","guid":{"rendered":"https:\/\/ppc.mit.edu\/t2\/?p=249"},"modified":"2025-11-03T20:20:17","modified_gmt":"2025-11-03T20:20:17","slug":"mit-tier2-report-april-23-2025","status":"publish","type":"post","link":"https:\/\/ppc.mit.edu\/t2\/?p=249","title":{"rendered":"MIT Tier-2 Report – April 23, 2025"},"content":{"rendered":"\n

SiteReadiness: 71.4%<\/p>\n\n\n\n

SAM tests: 91.8%<\/p>\n\n\n\n

We were adding for the first time more disks into one of the storage nodes. As a result of inexperience with CepFS internals one of the disks reached full state, and CephFS put itself into read only state. This affected our availability for two days. I asked Rucio team to put us in read only mode until storage disks are balanced. I also had to stop transferring data from HDFS into CephFS. I see that disk usage slowly getting even, but it is taking very long time.<\/p>\n\n\n\n

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SiteReadiness: 71.4% SAM tests: 91.8% We were adding for the first time more disks into one of the storage nodes. As a result of inexperience with CepFS internals one of the disks reached full state, and CephFS put itself into read only state. This affected our availability for two days. I asked Rucio team to … Read more<\/a><\/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-249","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\/249","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=249"}],"version-history":[{"count":3,"href":"https:\/\/ppc.mit.edu\/t2\/index.php?rest_route=\/wp\/v2\/posts\/249\/revisions"}],"predecessor-version":[{"id":647,"href":"https:\/\/ppc.mit.edu\/t2\/index.php?rest_route=\/wp\/v2\/posts\/249\/revisions\/647"}],"wp:attachment":[{"href":"https:\/\/ppc.mit.edu\/t2\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=249"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ppc.mit.edu\/t2\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=249"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ppc.mit.edu\/t2\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=249"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}