{"id":8167,"date":"2012-11-09T13:29:12","date_gmt":"2012-11-09T19:29:12","guid":{"rendered":"http:\/\/bucktownbell.com\/?p=8167"},"modified":"2012-11-09T13:34:20","modified_gmt":"2012-11-09T19:34:20","slug":"hadoop-corona","status":"publish","type":"post","link":"http:\/\/bucktownbell.com\/?p=8167","title":{"rendered":"Hadoop Corona"},"content":{"rendered":"<blockquote><p>Hadoop Corona is the next version of Map-Reduce. The current Map-Reduce has a single Job Tracker that reached its limits at Facebook. The Job Tracker manages the cluster resource and tracks the state of each job. In Hadoop Corona, the cluster resources are tracked by a central Cluster Manager. Each job gets its own Corona Job Tracker which tracks just that one job. The design provides some key improvements:<\/p><\/blockquote>\n<p>via <a href=\"https:\/\/github.com\/facebook\/hadoop-20\/tree\/master\/src\/contrib\/corona\">hadoop-20\/src\/contrib\/corona at master \u00b7 facebook\/hadoop-20 \u00b7 GitHub<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Hadoop Corona is the next version of Map-Reduce. The current Map-Reduce has a single Job Tracker that reached its limits at Facebook. The Job Tracker manages the cluster resource and tracks the state of each job. In Hadoop Corona, the &hellip; <a href=\"http:\/\/bucktownbell.com\/?p=8167\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[35],"tags":[51,114,187,402],"class_list":["post-8167","post","type-post","status-publish","format-standard","hentry","category-operating-systems","tag-clustering","tag-computer-architecture","tag-facebook","tag-hadoop"],"_links":{"self":[{"href":"http:\/\/bucktownbell.com\/index.php?rest_route=\/wp\/v2\/posts\/8167","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/bucktownbell.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/bucktownbell.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/bucktownbell.com\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/bucktownbell.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=8167"}],"version-history":[{"count":2,"href":"http:\/\/bucktownbell.com\/index.php?rest_route=\/wp\/v2\/posts\/8167\/revisions"}],"predecessor-version":[{"id":8169,"href":"http:\/\/bucktownbell.com\/index.php?rest_route=\/wp\/v2\/posts\/8167\/revisions\/8169"}],"wp:attachment":[{"href":"http:\/\/bucktownbell.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=8167"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/bucktownbell.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=8167"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/bucktownbell.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=8167"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}