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However, this just\nmagnifies the load on the container, as once the obj is written the\nobject server will then go and attempt to update the container, which\nwill also fail, writing down the root container as the destination in\nthe written async pending.\nThe object-updater then picks it up and keeps trying to hit the root. We\nbasically start ddosing ourselves.\n\nThis patch plumbs in the swift memcache client into the object-updater.\nAnd when enabled in config:\n\n  use_memcache \u003d True\n\nThe updater, when the target is a root container will first attempt to\nlook up the updating shards for the container in memcache. If found we\ncan bypass talking to the root container completely.\nIf the memcache list is outdated, at least we\u0027re talking to a shard and\nit can give us a 301 redirect to the correct shard.\n\nThis assumes under heavy load to a particular container that a request\nfinally manages to update the updating shardranges in memcache, but\nif that fails allows SRE to manually insert the update shard ranges into\nthe cache an eliviate much of the issues.\n\nTo accomplish this `get_cache_key` has been moved from\nproxy/controller/base.py and into common/utils.py.\n\nChange-Id: I8728adb10a9a5484147a7ca8f3441ffda4bd409d\n","web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/swift/commit/d7bf7cf8d043b61ca50f21aab2bdc11c26c18454"}],"resolve_conflicts_web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/swift/commit/d7bf7cf8d043b61ca50f21aab2bdc11c26c18454"}]},"branch":"refs/heads/master"},"9f34790f4c6d55c9ae8d57819af94d86639c5178":{"kind":"REWORK","_number":2,"created":"2023-03-01 03:50:58.000000000","uploader":{"_account_id":7233,"name":"Matthew Oliver","email":"matt@oliver.net.au","username":"mattoliverau"},"ref":"refs/changes/21/874721/2","fetch":{"anonymous http":{"url":"https://review.opendev.org/openstack/swift","ref":"refs/changes/21/874721/2","commands":{"Checkout":"git fetch https://review.opendev.org/openstack/swift refs/changes/21/874721/2 \u0026\u0026 git checkout FETCH_HEAD","Cherry Pick":"git fetch https://review.opendev.org/openstack/swift refs/changes/21/874721/2 \u0026\u0026 git cherry-pick FETCH_HEAD","Format Patch":"git fetch https://review.opendev.org/openstack/swift refs/changes/21/874721/2 \u0026\u0026 git format-patch -1 --stdout FETCH_HEAD","Pull":"git pull https://review.opendev.org/openstack/swift refs/changes/21/874721/2"}}},"commit":{"parents":[{"commit":"45bd6794b4bf72a057a6bd3353cef0876533c1ca","subject":"Proxy: restructure cached updating shard ranges","web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/swift/commit/45bd6794b4bf72a057a6bd3353cef0876533c1ca"}]}],"author":{"name":"Matthew Oliver","email":"matt@oliver.net.au","date":"2023-02-22 03:31:06.000000000","tz":660},"committer":{"name":"Matthew Oliver","email":"matt@oliver.net.au","date":"2023-03-01 03:49:53.000000000","tz":660},"subject":"updater: add memcache shard update lookup support","message":"updater: add memcache shard update lookup support\n\nWhen a root container gets under high load, the proxy can fail to get\nthe list of update shards and thereby writes the root account and\ncontainer as the destination for a container-update. However, this just\nmagnifies the load on the container, as once the obj is written the\nobject server will then go and attempt to update the container, which\nwill also fail, writing down the root container as the destination in\nthe written async pending.\nThe object-updater then picks it up and keeps trying to hit the root. We\nbasically start ddosing ourselves.\n\nThis patch plumbs in the swift memcache client into the object-updater.\nAnd when enabled in config:\n\n  use_memcache \u003d True\n\nThe updater, when the target is a root container will first attempt to\nlook up the updating shards for the container in memcache. If found we\ncan bypass talking to the root container completely.\nIf the memcache list is outdated, at least we\u0027re talking to a shard and\nit can give us a 301 redirect to the correct shard.\n\nThis assumes under heavy load to a particular container that a request\nfinally manages to update the updating shardranges in memcache, but\nif that fails allows SRE to manually insert the update shard ranges into\nthe cache an eliviate much of the issues.\n\nTo accomplish this `get_cache_key` has been moved from\nproxy/controller/base.py and into common/utils.py.\n\nChange-Id: I8728adb10a9a5484147a7ca8f3441ffda4bd409d\n","web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/swift/commit/9f34790f4c6d55c9ae8d57819af94d86639c5178"}],"resolve_conflicts_web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/swift/commit/9f34790f4c6d55c9ae8d57819af94d86639c5178"}]},"branch":"refs/heads/master"},"6ede2f3e364aadd9d2a7cea27112687872b0c01d":{"kind":"REWORK","_number":3,"created":"2023-03-01 05:32:37.000000000","uploader":{"_account_id":7233,"name":"Matthew Oliver","email":"matt@oliver.net.au","username":"mattoliverau"},"ref":"refs/changes/21/874721/3","fetch":{"anonymous http":{"url":"https://review.opendev.org/openstack/swift","ref":"refs/changes/21/874721/3","commands":{"Checkout":"git fetch https://review.opendev.org/openstack/swift refs/changes/21/874721/3 \u0026\u0026 git checkout FETCH_HEAD","Cherry Pick":"git fetch https://review.opendev.org/openstack/swift refs/changes/21/874721/3 \u0026\u0026 git cherry-pick FETCH_HEAD","Format Patch":"git fetch https://review.opendev.org/openstack/swift refs/changes/21/874721/3 \u0026\u0026 git format-patch -1 --stdout FETCH_HEAD","Pull":"git pull https://review.opendev.org/openstack/swift refs/changes/21/874721/3"}}},"commit":{"parents":[{"commit":"45bd6794b4bf72a057a6bd3353cef0876533c1ca","subject":"Proxy: restructure cached updating shard ranges","web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/swift/commit/45bd6794b4bf72a057a6bd3353cef0876533c1ca"}]}],"author":{"name":"Matthew Oliver","email":"matt@oliver.net.au","date":"2023-02-22 03:31:06.000000000","tz":660},"committer":{"name":"Matthew Oliver","email":"matt@oliver.net.au","date":"2023-03-01 05:30:12.000000000","tz":660},"subject":"updater: add memcache shard update lookup support","message":"updater: add memcache shard update lookup support\n\nWhen a root container gets under high load, the proxy can fail to get\nthe list of update shards and thereby writes the root account and\ncontainer as the destination for a container-update. However, this just\nmagnifies the load on the container, as once the obj is written the\nobject server will then go and attempt to update the container, which\nwill also fail, writing down the root container as the destination in\nthe written async pending.\nThe object-updater then picks it up and keeps trying to hit the root. We\nbasically start ddosing ourselves.\n\nThis patch plumbs in the swift memcache client into the object-updater.\nAnd when enabled in config:\n\n  use_memcache \u003d True\n\nThe updater, when the target is a root container will first attempt to\nlook up the updating shards for the container in memcache. If found we\ncan bypass talking to the root container completely.\nIf the memcache list is outdated, at least we\u0027re talking to a shard and\nit can give us a 301 redirect to the correct shard.\n\nThis assumes under heavy load to a particular container that a request\nfinally manages to update the updating shardranges in memcache, but\nif that fails allows SRE to manually insert the update shard ranges into\nthe cache an eliviate much of the issues.\n\nTo accomplish this `get_cache_key` has been moved from\nproxy/controller/base.py and into common/utils.py.\n\nChange-Id: I8728adb10a9a5484147a7ca8f3441ffda4bd409d\n","web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/swift/commit/6ede2f3e364aadd9d2a7cea27112687872b0c01d"}],"resolve_conflicts_web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/swift/commit/6ede2f3e364aadd9d2a7cea27112687872b0c01d"}]},"branch":"refs/heads/master"},"cdc66d846c53f8eb1bc24424831af74f2f84cef3":{"kind":"REWORK","_number":4,"created":"2023-03-06 08:45:00.000000000","uploader":{"_account_id":7233,"name":"Matthew Oliver","email":"matt@oliver.net.au","username":"mattoliverau"},"ref":"refs/changes/21/874721/4","fetch":{"anonymous http":{"url":"https://review.opendev.org/openstack/swift","ref":"refs/changes/21/874721/4","commands":{"Checkout":"git fetch https://review.opendev.org/openstack/swift refs/changes/21/874721/4 \u0026\u0026 git checkout FETCH_HEAD","Cherry Pick":"git fetch https://review.opendev.org/openstack/swift refs/changes/21/874721/4 \u0026\u0026 git cherry-pick FETCH_HEAD","Format Patch":"git fetch https://review.opendev.org/openstack/swift refs/changes/21/874721/4 \u0026\u0026 git format-patch -1 --stdout FETCH_HEAD","Pull":"git pull https://review.opendev.org/openstack/swift refs/changes/21/874721/4"}}},"commit":{"parents":[{"commit":"45bd6794b4bf72a057a6bd3353cef0876533c1ca","subject":"Proxy: restructure cached updating shard ranges","web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/swift/commit/45bd6794b4bf72a057a6bd3353cef0876533c1ca"}]}],"author":{"name":"Matthew Oliver","email":"matt@oliver.net.au","date":"2023-02-22 03:31:06.000000000","tz":660},"committer":{"name":"Matthew Oliver","email":"matt@oliver.net.au","date":"2023-03-06 08:41:10.000000000","tz":660},"subject":"updater: add memcache shard update lookup support","message":"updater: add memcache shard update lookup support\n\nWhen a root container gets under high load, the proxy can fail to get\nthe list of update shards and thereby writes the root account and\ncontainer as the destination for a container-update. However, this just\nmagnifies the load on the container, as once the obj is written the\nobject server will then go and attempt to update the container, which\nwill also fail, writing down the root container as the destination in\nthe written async pending.\nThe object-updater then picks it up and keeps trying to hit the root. We\nbasically start ddosing ourselves.\n\nThis patch plumbs in the swift memcache client into the object-updater.\nAnd when enabled in config:\n\n  use_memcache \u003d True\n\nThe updater, when the target is a root container will first attempt to\nlook up the updating shards for the container in memcache. If found we\ncan bypass talking to the root container completely.\nIf the memcache list is outdated, at least we\u0027re talking to a shard and\nit can give us a 301 redirect to the correct shard.\n\nThis assumes under heavy load to a particular container that a request\nfinally manages to update the updating shardranges in memcache, but\nif that fails allows SRE to manually insert the update shard ranges into\nthe cache an eliviate much of the issues.\n\nTo accomplish this `get_cache_key` has been moved from\nproxy/controller/base.py and into common/utils.py.\n\nFurther, db_state is now passed to the container-update and serialized\ninto async_pendings. This allows us behave differently if it\u0027s a sharded\nor unsharded container.\n\nChange-Id: I8728adb10a9a5484147a7ca8f3441ffda4bd409d\n","web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/swift/commit/cdc66d846c53f8eb1bc24424831af74f2f84cef3"}],"resolve_conflicts_web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/swift/commit/cdc66d846c53f8eb1bc24424831af74f2f84cef3"}]},"branch":"refs/heads/master"},"6862a5a9389c16a6f4b0c1ab4b24ba780be7dac7":{"kind":"TRIVIAL_REBASE_WITH_MESSAGE_UPDATE","_number":5,"created":"2023-03-08 01:35:10.000000000","uploader":{"_account_id":7233,"name":"Matthew Oliver","email":"matt@oliver.net.au","username":"mattoliverau"},"ref":"refs/changes/21/874721/5","fetch":{"anonymous http":{"url":"https://review.opendev.org/openstack/swift","ref":"refs/changes/21/874721/5","commands":{"Checkout":"git fetch https://review.opendev.org/openstack/swift refs/changes/21/874721/5 \u0026\u0026 git checkout FETCH_HEAD","Cherry Pick":"git fetch https://review.opendev.org/openstack/swift refs/changes/21/874721/5 \u0026\u0026 git cherry-pick FETCH_HEAD","Format Patch":"git fetch https://review.opendev.org/openstack/swift refs/changes/21/874721/5 \u0026\u0026 git format-patch -1 --stdout FETCH_HEAD","Pull":"git pull https://review.opendev.org/openstack/swift refs/changes/21/874721/5"}}},"commit":{"parents":[{"commit":"0c5f4d3ea5e5293ecb418efbcb053aaecdc1a86c","subject":"Pass db_state to container-update and async_pending","web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/swift/commit/0c5f4d3ea5e5293ecb418efbcb053aaecdc1a86c"}]}],"author":{"name":"Matthew Oliver","email":"matt@oliver.net.au","date":"2023-03-08 01:33:25.000000000","tz":660},"committer":{"name":"Matthew Oliver","email":"matt@oliver.net.au","date":"2023-03-08 01:33:25.000000000","tz":660},"subject":"updater: add memcache shard update lookup support","message":"updater: add memcache shard update lookup support\n\nWhen a root container gets under high load, the proxy can fail to get\nthe list of update shards and thereby writes the root account and\ncontainer as the destination for a container-update. However, this just\nmagnifies the load on the container, as once the obj is written the\nobject server will then go and attempt to update the container, which\nwill also fail, writing down the root container as the destination in\nthe written async pending.\nThe object-updater then picks it up and keeps trying to hit the root. We\nbasically start ddosing ourselves.\n\nThis patch plumbs in the swift memcache client into the object-updater.\nAnd when enabled in config:\n\n  use_memcache \u003d True\n\nThe updater, when the target is a root container will first attempt to\nlook up the updating shards for the container in memcache. If found we\ncan bypass talking to the root container completely.\nIf the memcache list is outdated, at least we\u0027re talking to a shard and\nit can give us a 301 redirect to the correct shard.\n\nThis assumes under heavy load to a particular container that a request\nfinally manages to update the updating shardranges in memcache, but\nif that fails allows SRE to manually insert the update shard ranges into\nthe cache an eliviate much of the issues.\n\nChange-Id: I8728adb10a9a5484147a7ca8f3441ffda4bd409d\n","web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/swift/commit/6862a5a9389c16a6f4b0c1ab4b24ba780be7dac7"}],"resolve_conflicts_web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/swift/commit/6862a5a9389c16a6f4b0c1ab4b24ba780be7dac7"}]},"branch":"refs/heads/master"}},"requirements":[],"submit_records":[{"rule_name":"gerrit~DefaultSubmitRule","status":"OK","labels":[{"label":"Verified","status":"MAY"},{"label":"Code-Review","status":"MAY"},{"label":"Workflow","status":"MAY"}]}],"submit_requirements":[{"name":"Verified","description":"Verified in gate by CI","status":"UNSATISFIED","is_legacy":false,"submittability_expression_result":{"expression":"label:Verified\u003dMAX AND -label:Verified\u003dMIN","fulfilled":false,"status":"FAIL","passing_atoms":[],"failing_atoms":["label:Verified\u003dMAX","label:Verified\u003dMIN"],"atom_explanations":{"label:Verified\u003dMAX":"","label:Verified\u003dMIN":""}}},{"name":"Code-Review","description":"Code reviewed by core reviewer","status":"UNSATISFIED","is_legacy":false,"submittability_expression_result":{"expression":"label:Code-Review\u003dMAX AND -label:Code-Review\u003dMIN","fulfilled":false,"status":"FAIL","passing_atoms":[],"failing_atoms":["label:Code-Review\u003dMAX","label:Code-Review\u003dMIN"],"atom_explanations":{"label:Code-Review\u003dMAX":"","label:Code-Review\u003dMIN":""}}},{"name":"Workflow","description":"Approved for gate by core reviewer","status":"UNSATISFIED","is_legacy":false,"submittability_expression_result":{"expression":"label:Workflow\u003dMAX AND -label:Workflow\u003dMIN","fulfilled":false,"status":"FAIL","passing_atoms":[],"failing_atoms":["label:Workflow\u003dMAX","label:Workflow\u003dMIN"],"atom_explanations":{"label:Workflow\u003dMAX":"","label:Workflow\u003dMIN":""}}}]}