{"action":"created","issue":{"url":"https://api.github.com/repos/chainer/chainer/issues/7697","repository_url":"https://api.github.com/repos/chainer/chainer","labels_url":"https://api.github.com/repos/chainer/chainer/issues/7697/labels{/name}","comments_url":"https://api.github.com/repos/chainer/chainer/issues/7697/comments","events_url":"https://api.github.com/repos/chainer/chainer/issues/7697/events","html_url":"https://github.com/chainer/chainer/pull/7697","id":464112783,"node_id":"MDExOlB1bGxSZXF1ZXN0Mjk0NDU4MTU2","number":7697,"title":"Delete deprecated communicators ","user":{"login":"keisukefukuda","id":18257,"node_id":"MDQ6VXNlcjE4MjU3","avatar_url":"https://avatars2.githubusercontent.com/u/18257?v=4","gravatar_id":"","url":"https://api.github.com/users/keisukefukuda","html_url":"https://github.com/keisukefukuda","followers_url":"https://api.github.com/users/keisukefukuda/followers","following_url":"https://api.github.com/users/keisukefukuda/following{/other_user}","gists_url":"https://api.github.com/users/keisukefukuda/gists{/gist_id}","starred_url":"https://api.github.com/users/keisukefukuda/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/keisukefukuda/subscriptions","organizations_url":"https://api.github.com/users/keisukefukuda/orgs","repos_url":"https://api.github.com/users/keisukefukuda/repos","events_url":"https://api.github.com/users/keisukefukuda/events{/privacy}","received_events_url":"https://api.github.com/users/keisukefukuda/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":2,"created_at":"2019-07-04T07:38:30Z","updated_at":"2019-07-04T08:10:55Z","closed_at":null,"author_association":"MEMBER","pull_request":{"url":"https://api.github.com/repos/chainer/chainer/pulls/7697","html_url":"https://github.com/chainer/chainer/pull/7697","diff_url":"https://github.com/chainer/chainer/pull/7697.diff","patch_url":"https://github.com/chainer/chainer/pull/7697.patch"},"body":"This PR removes deprecated communicators from ChainerMN.\r\nRemoved communicators are `TwoDimensional`, `Hierarchical`, `SingleNode`. \r\n\r\nThey were implemented when NCCL only supports intra-node communication and combination of MPI's allreduce and NCCL's allredcue was necessary. However, NCCL supports inter-node communication on its own and there is no longer a need for such hybrid communicator classes.\r\n\r\nNOTE: the removed communicators has been marked as `deprecated` in Chainer v6.\r\n"},"comment":{"url":"https://api.github.com/repos/chainer/chainer/issues/comments/508385740","html_url":"https://github.com/chainer/chainer/pull/7697#issuecomment-508385740","issue_url":"https://api.github.com/repos/chainer/chainer/issues/7697","id":508385740,"node_id":"MDEyOklzc3VlQ29tbWVudDUwODM4NTc0MA==","user":{"login":"belldandyxtq","id":5637270,"node_id":"MDQ6VXNlcjU2MzcyNzA=","avatar_url":"https://avatars3.githubusercontent.com/u/5637270?v=4","gravatar_id":"","url":"https://api.github.com/users/belldandyxtq","html_url":"https://github.com/belldandyxtq","followers_url":"https://api.github.com/users/belldandyxtq/followers","following_url":"https://api.github.com/users/belldandyxtq/following{/other_user}","gists_url":"https://api.github.com/users/belldandyxtq/gists{/gist_id}","starred_url":"https://api.github.com/users/belldandyxtq/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/belldandyxtq/subscriptions","organizations_url":"https://api.github.com/users/belldandyxtq/orgs","repos_url":"https://api.github.com/users/belldandyxtq/repos","events_url":"https://api.github.com/users/belldandyxtq/events{/privacy}","received_events_url":"https://api.github.com/users/belldandyxtq/received_events","type":"User","site_admin":false},"created_at":"2019-07-04T08:10:55Z","updated_at":"2019-07-04T08:10:55Z","author_association":"MEMBER","body":"Those in tests\r\n\r\nhttps://github.com/chainer/chainer/blob/57c8e85359d288dad51fcc4433be1dfdba228351/tests/chainermn_tests/communicator_tests/test_communicator.py#L937\r\nto the end"}}
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