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{"id":"openstack%2Fswift~667203","triplet_id":"openstack%2Fswift~master~Ic7a732146ea19a47669114ad5dbee0bacbe66919","project":"openstack/swift","branch":"master","topic":"bug/1781291","hashtags":[],"change_id":"Ic7a732146ea19a47669114ad5dbee0bacbe66919","subject":"sharding: Cache shard ranges for object writes","status":"MERGED","created":"2019-06-24 19:32:35.000000000","updated":"2019-07-13 00:35:27.000000000","submitted":"2019-07-13 00:34:05.000000000","submitter":{"_account_id":22348,"name":"Zuul","username":"zuul","tags":["SERVICE_USER"]},"total_comment_count":9,"unresolved_comment_count":0,"has_review_started":true,"submission_id":"667203-1562978046217-8d65fae4","meta_rev_id":"61fa12336eeed3a7372b381c3cdce8c0db5bae4b","_number":667203,"virtual_id_number":667203,"owner":{"_account_id":15343,"name":"Tim 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00:34:05.000000000","updated_by":{"_account_id":22348,"name":"Zuul","username":"zuul","tags":["SERVICE_USER"]},"reviewer":{"_account_id":22348,"name":"Zuul","username":"zuul","tags":["SERVICE_USER"]},"state":"REVIEWER"}],"messages":[{"id":"c11d92ea068db367c72bd74b426b5aa51afd0357","author":{"_account_id":15343,"name":"Tim Burke","email":"tburke@nvidia.com","username":"tburke"},"date":"2019-06-24 19:32:35.000000000","message":"Uploaded patch set 1.","accounts_in_message":[],"_revision_number":1},{"id":"9dffe9fce87e6f7777bf28b46da9af9a5e5b1732","author":{"_account_id":1179,"name":"Clay Gerrard","email":"clay.gerrard@gmail.com","username":"clay-gerrard"},"date":"2019-06-24 20:36:17.000000000","message":"Patch Set 1: Code-Review+1\n\n(1 comment)\n\nthis looks surprisingly obvious","accounts_in_message":[],"_revision_number":1},{"id":"99e4a0dd560dfff629587d291dcf94199ded05c2","author":{"_account_id":15343,"name":"Tim Burke","email":"tburke@nvidia.com","username":"tburke"},"date":"2019-06-24 21:23:07.000000000","message":"Patch Set 1:\n\n(1 comment)","accounts_in_message":[],"_revision_number":1},{"id":"b07e682128d813209ecae5efe4286dacbd7b5f67","author":{"_account_id":15343,"name":"Tim Burke","email":"tburke@nvidia.com","username":"tburke"},"date":"2019-06-24 21:25:14.000000000","message":"Patch Set 1:\n\nOh yeah, and if we really start to get worried about it, we can always start gzipping what we\u0027re cache -- there\u0027s even a bit of plumbing for that sort of thing: https://github.com/openstack/swift/blob/master/swift/common/memcached.py#L260-L263","accounts_in_message":[],"_revision_number":1},{"id":"4ac96dc09c19f7d463adf5bc25ef4bd2c4398a56","author":{"_account_id":15343,"name":"Tim Burke","email":"tburke@nvidia.com","username":"tburke"},"date":"2019-06-24 21:34:34.000000000","message":"Patch Set 1:\n\nThis should probably have a reference to https://bugs.launchpad.net/swift/+bug/1781291 -- and maybe I should try some LRUCache thing that dangles off the 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http://logs.openstack.org/03/667203/4/check/openstack-tox-pep8/d214fc6/ : SUCCESS in 5m 41s\n- swift-multinode-rolling-upgrade http://logs.openstack.org/03/667203/4/check/swift-multinode-rolling-upgrade/ff92aec/ : FAILURE in 9m 53s (non-voting)","accounts_in_message":[],"_revision_number":4},{"id":"15900fbbffc9d9cbff34abf15606c94b3278d0a7","author":{"_account_id":9625,"name":"Thiago da Silva","email":"thiagodasilva@gmail.com","username":"thiago"},"date":"2019-07-12 23:55:53.000000000","message":"Patch Set 4: Code-Review+2 Workflow+1\n\nlooks good. The code change is straight forward.\n\nThe tests show that requests are forwarded to container layer when shards are not cached and *not* forwarded when the shards are cached.","accounts_in_message":[],"_revision_number":4},{"id":"7d936cedaa0a95750b392801ea7e7818aeecb17c","author":{"_account_id":22348,"name":"Zuul","username":"zuul","tags":["SERVICE_USER"]},"date":"2019-07-12 23:56:05.000000000","message":"Patch Set 4: -Verified\n\nStarting gate jobs.","accounts_in_message":[],"_revision_number":4},{"id":"538bb7e05325cb3a7f3df99e4fcca0f442cd8eb1","author":{"_account_id":22348,"name":"Zuul","username":"zuul","tags":["SERVICE_USER"]},"date":"2019-07-13 00:34:05.000000000","message":"Patch Set 4: Verified+2\n\nBuild succeeded (gate pipeline).\n\n- openstack-tox-docs http://logs.openstack.org/03/667203/4/gate/openstack-tox-docs/c92acc3/html/ : SUCCESS in 4m 09s\n- swift-upload-image http://logs.openstack.org/03/667203/4/gate/swift-upload-image/b7b0dce/ : SUCCESS in 10m 20s (non-voting)\n- swift-tox-py27 http://logs.openstack.org/03/667203/4/gate/swift-tox-py27/c2c9581/ : SUCCESS in 14m 53s\n- swift-tox-py37 http://logs.openstack.org/03/667203/4/gate/swift-tox-py37/d364d4f/ : SUCCESS in 13m 02s\n- swift-tox-func http://logs.openstack.org/03/667203/4/gate/swift-tox-func/2761f2d/ : SUCCESS in 8m 36s\n- swift-tox-func-py37 http://logs.openstack.org/03/667203/4/gate/swift-tox-func-py37/f131694/ : SUCCESS in 12m 18s\n- swift-tox-func-encryption http://logs.openstack.org/03/667203/4/gate/swift-tox-func-encryption/9107ed9/ : SUCCESS in 9m 09s\n- swift-tox-func-domain-remap-staticweb http://logs.openstack.org/03/667203/4/gate/swift-tox-func-domain-remap-staticweb/189e466/ : SUCCESS in 11m 25s\n- swift-tox-func-ec http://logs.openstack.org/03/667203/4/gate/swift-tox-func-ec/85dbaa8/ : SUCCESS in 13m 55s\n- swift-tox-func-s3api http://logs.openstack.org/03/667203/4/gate/swift-tox-func-s3api/271d90c/ : SUCCESS in 13m 54s\n- swift-tox-func-domain-remap-staticweb-py37 http://logs.openstack.org/03/667203/4/gate/swift-tox-func-domain-remap-staticweb-py37/aabf05d/ : SUCCESS in 7m 37s\n- swift-probetests-centos-7 http://logs.openstack.org/03/667203/4/gate/swift-probetests-centos-7/fbb0cea/ : SUCCESS in 37m 03s\n- swift-dsvm-functional http://logs.openstack.org/03/667203/4/gate/swift-dsvm-functional/2d2db19/ : SUCCESS in 29m 34s\n- swift-dsvm-functional-py3 http://logs.openstack.org/03/667203/4/gate/swift-dsvm-functional-py3/a8087f4/ : SUCCESS in 31m 19s\n- swift-dsvm-functional-ipv6 http://logs.openstack.org/03/667203/4/gate/swift-dsvm-functional-ipv6/3ff2245/ : SUCCESS in 25m 17s\n- swift-tox-lower-constraints http://logs.openstack.org/03/667203/4/gate/swift-tox-lower-constraints/c788689/ : SUCCESS in 14m 27s\n- openstack-tox-pep8 http://logs.openstack.org/03/667203/4/gate/openstack-tox-pep8/cb68be3/ : SUCCESS in 5m 23s","accounts_in_message":[],"_revision_number":4},{"id":"3870d6f6e66bc1d8a196129299ece54598fa69ab","author":{"_account_id":22348,"name":"Zuul","username":"zuul","tags":["SERVICE_USER"]},"date":"2019-07-13 00:34:06.000000000","message":"Change has been successfully merged by Zuul","accounts_in_message":[],"_revision_number":4},{"id":"541c5196e987dc6f5716765d6633b6176bd12f4e","author":{"_account_id":22348,"name":"Zuul","username":"zuul","tags":["SERVICE_USER"]},"date":"2019-07-13 00:35:27.000000000","message":"Patch Set 4:\n\nBuild succeeded (promote pipeline).\n\n- swift-promote-image http://logs.openstack.org/03/667203/4/promote/swift-promote-image/90faea9/ : SUCCESS in 59s (non-voting)","accounts_in_message":[],"_revision_number":4}],"current_revision_number":4,"current_revision":"a1af3811a79963e2e5d1db3e5588cbc9748f9d57","revisions":{"767b6758317ac1b88f40162e7f653b911fb7371b":{"kind":"REWORK","_number":1,"created":"2019-06-24 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This puts load on the container server, potentially\nleading to timeouts, error limiting, and erroneous 404s (!).\n\nNow, cache the complete set of \u0027updating\u0027 shards, and find the shard for\nthis particular update in the proxy. Add a new config option,\nrecheck_updating_shard_ranges, to control the cache time; it defaults to\none hour. Set to 0 to fall back to previous behavior.\n\nNote that we should be able to tolerate stale shard data just fine; we\nalready have to worry about async pendings that got written down with\none shard but may not get processed until that shard has itself sharded\nor shrunk into another shard.\n\nChange-Id: Ic7a732146ea19a47669114ad5dbee0bacbe66919\n","web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/swift/commit/767b6758317ac1b88f40162e7f653b911fb7371b"}],"resolve_conflicts_web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/swift/commit/767b6758317ac1b88f40162e7f653b911fb7371b"}]},"branch":"refs/heads/master"},"844b6fa06e1f8724a02b292af23cd176790667e4":{"kind":"REWORK","_number":2,"created":"2019-06-25 16:16:07.000000000","uploader":{"_account_id":15343,"name":"Tim Burke","email":"tburke@nvidia.com","username":"tburke"},"ref":"refs/changes/03/667203/2","fetch":{"anonymous http":{"url":"https://review.opendev.org/openstack/swift","ref":"refs/changes/03/667203/2","commands":{"Checkout":"git fetch https://review.opendev.org/openstack/swift refs/changes/03/667203/2 \u0026\u0026 git checkout FETCH_HEAD","Cherry Pick":"git fetch https://review.opendev.org/openstack/swift refs/changes/03/667203/2 \u0026\u0026 git cherry-pick FETCH_HEAD","Format Patch":"git fetch https://review.opendev.org/openstack/swift refs/changes/03/667203/2 \u0026\u0026 git format-patch -1 --stdout FETCH_HEAD","Pull":"git pull https://review.opendev.org/openstack/swift refs/changes/03/667203/2"}}},"commit":{"parents":[{"commit":"82169ead1cc1c60318507fc3f0fbd7deff0f15e9","subject":"Don\u0027t handle object without container","web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/swift/commit/82169ead1cc1c60318507fc3f0fbd7deff0f15e9"}]}],"author":{"name":"Tim Burke","email":"tim.burke@gmail.com","date":"2019-06-24 19:25:33.000000000","tz":-420},"committer":{"name":"Tim Burke","email":"tim.burke@gmail.com","date":"2019-06-25 16:14:35.000000000","tz":-420},"subject":"sharding: Cache shard ranges for object writes","message":"sharding: Cache shard ranges for object writes\n\nPreviously, we issued a GET to the root container for every object PUT,\nPOST, and DELETE. This puts load on the container server, potentially\nleading to timeouts, error limiting, and erroneous 404s (!).\n\nNow, cache the complete set of \u0027updating\u0027 shards, and find the shard for\nthis particular update in the proxy. Add a new config option,\nrecheck_updating_shard_ranges, to control the cache time; it defaults to\none hour. Set to 0 to fall back to previous behavior.\n\nNote that we should be able to tolerate stale shard data just fine; we\nalready have to worry about async pendings that got written down with\none shard but may not get processed until that shard has itself sharded\nor shrunk into another shard.\n\nAlso note that memcache has a default value limit of 1MiB, which may be\nexceeded if a container has thousands of shards. In that case, set()\nwill act like a delete(), causing increased memcache churn but otherwise\npreserving existing behavior. In the future, we may want to add support\nfor gzipping the cached shard ranges as they should compress well.\n\nChange-Id: Ic7a732146ea19a47669114ad5dbee0bacbe66919\nCloses-Bug: 1781291\n","web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/swift/commit/844b6fa06e1f8724a02b292af23cd176790667e4"}],"resolve_conflicts_web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/swift/commit/844b6fa06e1f8724a02b292af23cd176790667e4"}]},"branch":"refs/heads/master"},"30fb94fb0a32a07ebd888b7f598e1e0fb04c0c8b":{"kind":"REWORK","_number":3,"created":"2019-06-25 23:17:29.000000000","uploader":{"_account_id":15343,"name":"Tim Burke","email":"tburke@nvidia.com","username":"tburke"},"ref":"refs/changes/03/667203/3","fetch":{"anonymous http":{"url":"https://review.opendev.org/openstack/swift","ref":"refs/changes/03/667203/3","commands":{"Checkout":"git fetch https://review.opendev.org/openstack/swift refs/changes/03/667203/3 \u0026\u0026 git checkout FETCH_HEAD","Cherry Pick":"git fetch https://review.opendev.org/openstack/swift refs/changes/03/667203/3 \u0026\u0026 git cherry-pick FETCH_HEAD","Format Patch":"git fetch https://review.opendev.org/openstack/swift refs/changes/03/667203/3 \u0026\u0026 git format-patch -1 --stdout FETCH_HEAD","Pull":"git pull https://review.opendev.org/openstack/swift refs/changes/03/667203/3"}}},"commit":{"parents":[{"commit":"82169ead1cc1c60318507fc3f0fbd7deff0f15e9","subject":"Don\u0027t handle object without container","web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/swift/commit/82169ead1cc1c60318507fc3f0fbd7deff0f15e9"}]}],"author":{"name":"Tim Burke","email":"tim.burke@gmail.com","date":"2019-06-24 19:25:33.000000000","tz":-420},"committer":{"name":"Tim Burke","email":"tim.burke@gmail.com","date":"2019-06-25 23:17:11.000000000","tz":-420},"subject":"sharding: Cache shard ranges for object writes","message":"sharding: Cache shard ranges for object writes\n\nPreviously, we issued a GET to the root container for every object PUT,\nPOST, and DELETE. This puts load on the container server, potentially\nleading to timeouts, error limiting, and erroneous 404s (!).\n\nNow, cache the complete set of \u0027updating\u0027 shards, and find the shard for\nthis particular update in the proxy. Add a new config option,\nrecheck_updating_shard_ranges, to control the cache time; it defaults to\none hour. Set to 0 to fall back to previous behavior.\n\nNote that we should be able to tolerate stale shard data just fine; we\nalready have to worry about async pendings that got written down with\none shard but may not get processed until that shard has itself sharded\nor shrunk into another shard.\n\nAlso note that memcache has a default value limit of 1MiB, which may be\nexceeded if a container has thousands of shards. In that case, set()\nwill act like a delete(), causing increased memcache churn but otherwise\npreserving existing behavior. In the future, we may want to add support\nfor gzipping the cached shard ranges as they should compress well.\n\nChange-Id: Ic7a732146ea19a47669114ad5dbee0bacbe66919\nCloses-Bug: 1781291\n","web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/swift/commit/30fb94fb0a32a07ebd888b7f598e1e0fb04c0c8b"}],"resolve_conflicts_web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/swift/commit/30fb94fb0a32a07ebd888b7f598e1e0fb04c0c8b"}]},"branch":"refs/heads/master"},"a1af3811a79963e2e5d1db3e5588cbc9748f9d57":{"kind":"REWORK","_number":4,"created":"2019-07-11 17:40:53.000000000","uploader":{"_account_id":15343,"name":"Tim Burke","email":"tburke@nvidia.com","username":"tburke"},"ref":"refs/changes/03/667203/4","fetch":{"anonymous http":{"url":"https://review.opendev.org/openstack/swift","ref":"refs/changes/03/667203/4","commands":{"Checkout":"git fetch https://review.opendev.org/openstack/swift refs/changes/03/667203/4 \u0026\u0026 git checkout FETCH_HEAD","Cherry Pick":"git fetch https://review.opendev.org/openstack/swift refs/changes/03/667203/4 \u0026\u0026 git cherry-pick FETCH_HEAD","Format Patch":"git fetch https://review.opendev.org/openstack/swift refs/changes/03/667203/4 \u0026\u0026 git format-patch -1 --stdout FETCH_HEAD","Pull":"git pull https://review.opendev.org/openstack/swift refs/changes/03/667203/4"}}},"commit":{"parents":[{"commit":"e62f07d9884c584233fd55f46c2dd79257c23bd9","subject":"Merge \"py3: port staticweb and domain_remap func tests\"","web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/swift/commit/e62f07d9884c584233fd55f46c2dd79257c23bd9"}]}],"author":{"name":"Tim Burke","email":"tim.burke@gmail.com","date":"2019-06-24 19:25:33.000000000","tz":-420},"committer":{"name":"Tim Burke","email":"tim.burke@gmail.com","date":"2019-07-11 17:40:38.000000000","tz":-420},"subject":"sharding: Cache shard ranges for object writes","message":"sharding: Cache shard ranges for object writes\n\nPreviously, we issued a GET to the root container for every object PUT,\nPOST, and DELETE. This puts load on the container server, potentially\nleading to timeouts, error limiting, and erroneous 404s (!).\n\nNow, cache the complete set of \u0027updating\u0027 shards, and find the shard for\nthis particular update in the proxy. Add a new config option,\nrecheck_updating_shard_ranges, to control the cache time; it defaults to\none hour. Set to 0 to fall back to previous behavior.\n\nNote that we should be able to tolerate stale shard data just fine; we\nalready have to worry about async pendings that got written down with\none shard but may not get processed until that shard has itself sharded\nor shrunk into another shard.\n\nAlso note that memcache has a default value limit of 1MiB, which may be\nexceeded if a container has thousands of shards. In that case, set()\nwill act like a delete(), causing increased memcache churn but otherwise\npreserving existing behavior. In the future, we may want to add support\nfor gzipping the cached shard ranges as they should compress well.\n\nChange-Id: Ic7a732146ea19a47669114ad5dbee0bacbe66919\nCloses-Bug: 1781291\n","web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/swift/commit/a1af3811a79963e2e5d1db3e5588cbc9748f9d57"}],"resolve_conflicts_web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/swift/commit/a1af3811a79963e2e5d1db3e5588cbc9748f9d57"}]},"branch":"refs/heads/master"}},"requirements":[],"submit_records":[],"submit_requirements":[]}