{"action":"opened","issue":{"url":"https://api.github.com/repos/kubernetes/node-problem-detector/issues/37","repository_url":"https://api.github.com/repos/kubernetes/node-problem-detector","labels_url":"https://api.github.com/repos/kubernetes/node-problem-detector/issues/37/labels{/name}","comments_url":"https://api.github.com/repos/kubernetes/node-problem-detector/issues/37/comments","events_url":"https://api.github.com/repos/kubernetes/node-problem-detector/issues/37/events","html_url":"https://github.com/kubernetes/node-problem-detector/issues/37","id":187467450,"number":37,"title":"Node problem detector should use apiserver cache.","user":{"login":"Random-Liu","id":5821883,"avatar_url":"https://avatars.githubusercontent.com/u/5821883?v=3","gravatar_id":"","url":"https://api.github.com/users/Random-Liu","html_url":"https://github.com/Random-Liu","followers_url":"https://api.github.com/users/Random-Liu/followers","following_url":"https://api.github.com/users/Random-Liu/following{/other_user}","gists_url":"https://api.github.com/users/Random-Liu/gists{/gist_id}","starred_url":"https://api.github.com/users/Random-Liu/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/Random-Liu/subscriptions","organizations_url":"https://api.github.com/users/Random-Liu/orgs","repos_url":"https://api.github.com/users/Random-Liu/repos","events_url":"https://api.github.com/users/Random-Liu/events{/privacy}","received_events_url":"https://api.github.com/users/Random-Liu/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":0,"created_at":"2016-11-05T01:07:34Z","updated_at":"2016-11-05T01:07:34Z","closed_at":null,"body":"Currently, NPD sent a PATCH every 30 seconds, which could be a significant overhead for apiserver in large cluster.\r\n\r\nEven in periodical resync, we should `GET` first and only send `PATCH` when the conditions are actually different.\r\n\r\nFurther more, we could use the same trick with kubelet to leverage the apiserver cache to reduce the load even more. https://github.com/kubernetes/kubernetes/blame/master/pkg/kubelet/kubelet_node_status.go#L313-L322"}}
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