{"action":"opened","number":603,"pull_request":{"url":"https://api.github.com/repos/weaveworks/cortex/pulls/603","id":153520968,"html_url":"https://github.com/weaveworks/cortex/pull/603","diff_url":"https://github.com/weaveworks/cortex/pull/603.diff","patch_url":"https://github.com/weaveworks/cortex/pull/603.patch","issue_url":"https://api.github.com/repos/weaveworks/cortex/issues/603","number":603,"state":"open","locked":false,"title":"Parallel chunk fetching from DynamoDB","user":{"login":"bboreham","id":8125524,"avatar_url":"https://avatars2.githubusercontent.com/u/8125524?v=4","gravatar_id":"","url":"https://api.github.com/users/bboreham","html_url":"https://github.com/bboreham","followers_url":"https://api.github.com/users/bboreham/followers","following_url":"https://api.github.com/users/bboreham/following{/other_user}","gists_url":"https://api.github.com/users/bboreham/gists{/gist_id}","starred_url":"https://api.github.com/users/bboreham/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/bboreham/subscriptions","organizations_url":"https://api.github.com/users/bboreham/orgs","repos_url":"https://api.github.com/users/bboreham/repos","events_url":"https://api.github.com/users/bboreham/events{/privacy}","received_events_url":"https://api.github.com/users/bboreham/received_events","type":"User","site_admin":false},"body":"Run multiple goroutines in parallel to drive DynamoDB harder: group chunk fetches into \"gangs\" to allow some configuration over how hard we hit DynamoDB\r\n\r\nThis is a very simple scheme; it could be done much more intelligently but I think it's worth deploying something simple \r\n\r\nExample query shown below, run against dev: although the overall time is only a little shorter this includes one DynamoDB batch fetch that took 3 seconds, similar to what is described at #602.  In the presence of throttling it gets more efficient to run several queries in parallel which may hit different tables or shards.\r\n\r\nQuery is `sum(rate(container_cpu_usage_seconds_total{image!=\"\",namespace!=\"\"}[5m])) BY (namespace)` start=1510770800 end=1510770830\r\n\r\nTrace before:\r\n\r\n![image](https://user-images.githubusercontent.com/8125524/32996591-8b3e1246-cd7c-11e7-97d4-9b30088ef03d.png)\r\n\r\nand after:\r\n\r\n![image](https://user-images.githubusercontent.com/8125524/32996559-26a05768-cd7c-11e7-9e77-0aa56810e7cf.png)\r\n","created_at":"2017-11-19T23:04:11Z","updated_at":"2017-11-19T23:04:11Z","closed_at":null,"merged_at":null,"merge_commit_sha":null,"assignee":null,"assignees":[],"requested_reviewers":[],"milestone":null,"commits_url":"https://api.github.com/repos/weaveworks/cortex/pulls/603/commits","review_comments_url":"https://api.github.com/repos/weaveworks/cortex/pulls/603/comments","review_comment_url":"https://api.github.com/repos/weaveworks/cortex/pulls/comments{/number}","comments_url":"https://api.github.com/repos/weaveworks/cortex/issues/603/comments","statuses_url":"https://api.github.com/repos/weaveworks/cortex/statuses/7f867879cf263dc2e9abae7927c693b880553847","head":{"label":"weaveworks:parallel-dynamodb-chunk-fetch","ref":"parallel-dynamodb-chunk-fetch","sha":"7f867879cf263dc2e9abae7927c693b880553847","user":{"login":"weaveworks","id":9976052,"avatar_url":"https://avatars1.githubusercontent.com/u/9976052?v=4","gravatar_id":"","url":"https://api.github.com/users/weaveworks","html_url":"https://github.com/weaveworks","followers_url":"https://api.github.com/users/weaveworks/followers","following_url":"https://api.github.com/users/weaveworks/following{/other_user}","gists_url":"https://api.github.com/users/weaveworks/gists{/gist_id}","starred_url":"https://api.github.com/users/weaveworks/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/weaveworks/subscriptions","organizations_url":"https://api.github.com/users/weaveworks/orgs","repos_url":"https://api.github.com/users/weaveworks/repos","events_url":"https://api.github.com/users/weaveworks/events{/privacy}","received_events_url":"https://api.github.com/users/weaveworks/received_events","type":"Organization","site_admin":false},"repo":{"id":67793333,"name":"cortex","full_name":"weaveworks/cortex","owner":{"login":"weaveworks","id":9976052,"avatar_url":"https://avatars1.githubusercontent.com/u/9976052?v=4","gravatar_id":"","url":"https://api.github.com/users/weaveworks","html_url":"https://github.com/weaveworks","followers_url":"https://api.github.com/users/weaveworks/followers","following_url":"https://api.github.com/users/weaveworks/following{/other_user}","gists_url":"https://api.github.com/users/weaveworks/gists{/gist_id}","starred_url":"https://api.github.com/users/weaveworks/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/weaveworks/subscriptions","organizations_url":"https://api.github.com/users/weaveworks/orgs","repos_url":"https://api.github.com/users/weaveworks/repos","events_url":"https://api.github.com/users/weaveworks/events{/privacy}","received_events_url":"https://api.github.com/users/weaveworks/received_events","type":"Organization","site_admin":false},"private":false,"html_url":"https://github.com/weaveworks/cortex","description":"A multitenant, horizontally scalable Prometheus as a Service","fork":false,"url":"https://api.github.com/repos/weaveworks/cortex","forks_url":"https://api.github.com/repos/weaveworks/cortex/forks","keys_url":"https://api.github.com/repos/weaveworks/cortex/keys{/key_id}","collaborators_url":"https://api.github.com/repos/weaveworks/cortex/collaborators{/collaborator}","teams_url":"https://api.github.com/repos/weaveworks/cortex/teams","hooks_url":"https://api.github.com/repos/weaveworks/cortex/hooks","issue_events_url":"https://api.github.com/repos/weaveworks/cortex/issues/events{/number}","events_url":"https://api.github.com/repos/weaveworks/cortex/events","assignees_url":"https://api.github.com/repos/weaveworks/cortex/assignees{/user}","branches_url":"https://api.github.com/repos/weaveworks/cortex/branches{/branch}","tags_url":"https://api.github.com/repos/weaveworks/cortex/tags","blobs_url":"https://api.github.com/repos/weaveworks/cortex/git/blobs{/sha}","git_tags_url":"https://api.github.com/repos/weaveworks/cortex/git/tags{/sha}","git_refs_url":"https://api.github.com/repos/weaveworks/cortex/git/refs{/sha}","trees_url":"https://api.github.com/repos/weaveworks/cortex/git/trees{/sha}","statuses_url":"https://api.github.com/repos/weaveworks/cortex/statuses/{sha}","languages_url":"https://api.github.com/repos/weaveworks/cortex/languages","stargazers_url":"https://api.github.com/repos/weaveworks/cortex/stargazers","contributors_url":"https://api.github.com/repos/weaveworks/cortex/contributors","subscribers_url":"https://api.github.com/repos/weaveworks/cortex/subscribers","subscription_url":"https://api.github.com/repos/weaveworks/cortex/subscription","commits_url":"https://api.github.com/repos/weaveworks/cortex/commits{/sha}","git_commits_url":"https://api.github.com/repos/weaveworks/cortex/git/commits{/sha}","comments_url":"https://api.github.com/repos/weaveworks/cortex/comments{/number}","issue_comment_url":"https://api.github.com/repos/weaveworks/cortex/issues/comments{/number}","contents_url":"https://api.github.com/repos/weaveworks/cortex/contents/{+path}","compare_url":"https://api.github.com/repos/weaveworks/cortex/compare/{base}...{head}","merges_url":"https://api.github.com/repos/weaveworks/cortex/merges","archive_url":"https://api.github.com/repos/weaveworks/cortex/{archive_format}{/ref}","downloads_url":"https://api.github.com/repos/weaveworks/cortex/downloads","issues_url":"https://api.github.com/repos/weaveworks/cortex/issues{/number}","pulls_url":"https://api.github.com/repos/weaveworks/cortex/pulls{/number}","milestones_url":"https://api.github.com/repos/weaveworks/cortex/milestones{/number}","notifications_url":"https://api.github.com/repos/weaveworks/cortex/notifications{?since,all,participating}","labels_url":"https://api.github.com/repos/weaveworks/cortex/labels{/name}","releases_url":"https://api.github.com/repos/weaveworks/cortex/releases{/id}","deployments_url":"https://api.github.com/repos/weaveworks/cortex/deployments","created_at":"2016-09-09T11:23:12Z","updated_at":"2017-11-18T09:02:34Z","pushed_at":"2017-11-19T22:48:45Z","git_url":"git://github.com/weaveworks/cortex.git","ssh_url":"git@github.com:weaveworks/cortex.git","clone_url":"https://github.com/weaveworks/cortex.git","svn_url":"https://github.com/weaveworks/cortex","homepage":null,"size":78975,"stargazers_count":352,"watchers_count":352,"language":"Go","has_issues":true,"has_projects":true,"has_downloads":true,"has_wiki":true,"has_pages":false,"forks_count":36,"mirror_url":null,"archived":false,"open_issues_count":82,"forks":36,"open_issues":82,"watchers":352,"default_branch":"master"}},"base":{"label":"weaveworks:master","ref":"master","sha":"c410790122765c9b093a64d535f3493b9b27bcfd","user":{"login":"weaveworks","id":9976052,"avatar_url":"https://avatars1.githubusercontent.com/u/9976052?v=4","gravatar_id":"","url":"https://api.github.com/users/weaveworks","html_url":"https://github.com/weaveworks","followers_url":"https://api.github.com/users/weaveworks/followers","following_url":"https://api.github.com/users/weaveworks/following{/other_user}","gists_url":"https://api.github.com/users/weaveworks/gists{/gist_id}","starred_url":"https://api.github.com/users/weaveworks/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/weaveworks/subscriptions","organizations_url":"https://api.github.com/users/weaveworks/orgs","repos_url":"https://api.github.com/users/weaveworks/repos","events_url":"https://api.github.com/users/weaveworks/events{/privacy}","received_events_url":"https://api.github.com/users/weaveworks/received_events","type":"Organization","site_admin":false},"repo":{"id":67793333,"name":"cortex","full_name":"weaveworks/cortex","owner":{"login":"weaveworks","id":9976052,"avatar_url":"https://avatars1.githubusercontent.com/u/9976052?v=4","gravatar_id":"","url":"https://api.github.com/users/weaveworks","html_url":"https://github.com/weaveworks","followers_url":"https://api.github.com/users/weaveworks/followers","following_url":"https://api.github.com/users/weaveworks/following{/other_user}","gists_url":"https://api.github.com/users/weaveworks/gists{/gist_id}","starred_url":"https://api.github.com/users/weaveworks/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/weaveworks/subscriptions","organizations_url":"https://api.github.com/users/weaveworks/orgs","repos_url":"https://api.github.com/users/weaveworks/repos","events_url":"https://api.github.com/users/weaveworks/events{/privacy}","received_events_url":"https://api.github.com/users/weaveworks/received_events","type":"Organization","site_admin":false},"private":false,"html_url":"https://github.com/weaveworks/cortex","description":"A multitenant, horizontally scalable Prometheus as a Service","fork":false,"url":"https://api.github.com/repos/weaveworks/cortex","forks_url":"https://api.github.com/repos/weaveworks/cortex/forks","keys_url":"https://api.github.com/repos/weaveworks/cortex/keys{/key_id}","collaborators_url":"https://api.github.com/repos/weaveworks/cortex/collaborators{/collaborator}","teams_url":"https://api.github.com/repos/weaveworks/cortex/teams","hooks_url":"https://api.github.com/repos/weaveworks/cortex/hooks","issue_events_url":"https://api.github.com/repos/weaveworks/cortex/issues/events{/number}","events_url":"https://api.github.com/repos/weaveworks/cortex/events","assignees_url":"https://api.github.com/repos/weaveworks/cortex/assignees{/user}","branches_url":"https://api.github.com/repos/weaveworks/cortex/branches{/branch}","tags_url":"https://api.github.com/repos/weaveworks/cortex/tags","blobs_url":"https://api.github.com/repos/weaveworks/cortex/git/blobs{/sha}","git_tags_url":"https://api.github.com/repos/weaveworks/cortex/git/tags{/sha}","git_refs_url":"https://api.github.com/repos/weaveworks/cortex/git/refs{/sha}","trees_url":"https://api.github.com/repos/weaveworks/cortex/git/trees{/sha}","statuses_url":"https://api.github.com/repos/weaveworks/cortex/statuses/{sha}","languages_url":"https://api.github.com/repos/weaveworks/cortex/languages","stargazers_url":"https://api.github.com/repos/weaveworks/cortex/stargazers","contributors_url":"https://api.github.com/repos/weaveworks/cortex/contributors","subscribers_url":"https://api.github.com/repos/weaveworks/cortex/subscribers","subscription_url":"https://api.github.com/repos/weaveworks/cortex/subscription","commits_url":"https://api.github.com/repos/weaveworks/cortex/commits{/sha}","git_commits_url":"https://api.github.com/repos/weaveworks/cortex/git/commits{/sha}","comments_url":"https://api.github.com/repos/weaveworks/cortex/comments{/number}","issue_comment_url":"https://api.github.com/repos/weaveworks/cortex/issues/comments{/number}","contents_url":"https://api.github.com/repos/weaveworks/cortex/contents/{+path}","compare_url":"https://api.github.com/repos/weaveworks/cortex/compare/{base}...{head}","merges_url":"https://api.github.com/repos/weaveworks/cortex/merges","archive_url":"https://api.github.com/repos/weaveworks/cortex/{archive_format}{/ref}","downloads_url":"https://api.github.com/repos/weaveworks/cortex/downloads","issues_url":"https://api.github.com/repos/weaveworks/cortex/issues{/number}","pulls_url":"https://api.github.com/repos/weaveworks/cortex/pulls{/number}","milestones_url":"https://api.github.com/repos/weaveworks/cortex/milestones{/number}","notifications_url":"https://api.github.com/repos/weaveworks/cortex/notifications{?since,all,participating}","labels_url":"https://api.github.com/repos/weaveworks/cortex/labels{/name}","releases_url":"https://api.github.com/repos/weaveworks/cortex/releases{/id}","deployments_url":"https://api.github.com/repos/weaveworks/cortex/deployments","created_at":"2016-09-09T11:23:12Z","updated_at":"2017-11-18T09:02:34Z","pushed_at":"2017-11-19T22:48:45Z","git_url":"git://github.com/weaveworks/cortex.git","ssh_url":"git@github.com:weaveworks/cortex.git","clone_url":"https://github.com/weaveworks/cortex.git","svn_url":"https://github.com/weaveworks/cortex","homepage":null,"size":78975,"stargazers_count":352,"watchers_count":352,"language":"Go","has_issues":true,"has_projects":true,"has_downloads":true,"has_wiki":true,"has_pages":false,"forks_count":36,"mirror_url":null,"archived":false,"open_issues_count":82,"forks":36,"open_issues":82,"watchers":352,"default_branch":"master"}},"_links":{"self":{"href":"https://api.github.com/repos/weaveworks/cortex/pulls/603"},"html":{"href":"https://github.com/weaveworks/cortex/pull/603"},"issue":{"href":"https://api.github.com/repos/weaveworks/cortex/issues/603"},"comments":{"href":"https://api.github.com/repos/weaveworks/cortex/issues/603/comments"},"review_comments":{"href":"https://api.github.com/repos/weaveworks/cortex/pulls/603/comments"},"review_comment":{"href":"https://api.github.com/repos/weaveworks/cortex/pulls/comments{/number}"},"commits":{"href":"https://api.github.com/repos/weaveworks/cortex/pulls/603/commits"},"statuses":{"href":"https://api.github.com/repos/weaveworks/cortex/statuses/7f867879cf263dc2e9abae7927c693b880553847"}},"author_association":"OWNER","merged":false,"mergeable":null,"rebaseable":null,"mergeable_state":"unknown","merged_by":null,"comments":0,"review_comments":0,"maintainer_can_modify":false,"commits":1,"additions":29,"deletions":2,"changed_files":1}}
{"actor":{"display_login":"bboreham"}}