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20:20:43.000000000","tz":-300},"subject":"Parallelize per-node resource updates","message":"Parallelize per-node resource updates\n\nThe update_available_resource periodic task updates every node managed\nby a compute service serially. This is acceptable for drivers that\nmanage one or a small number of nodes, but it can make nova-compute\nstartup and periodic resource reporting take many minutes for large\nIronic deployments where a single compute service can manage\nhundreds or thousands of bare metal nodes.\n\nAdd [compute] update_resources_max_workers, defaulting to 1, to let\noperators fan out per-node updates through the compute service\nexecutor. The default keeps the previous sequential behavior.\nLarger values allow Ironic deployments to trade additional\nnova-compute CPU usage and Placement API concurrency for lower\nwall-clock update latency.\n\nThe parallel path drains every scheduled future before returning. If\none or more per-node updates fail, the first exception is re-raised\nafter all futures are drained so startup-fatal errors keep the same\nsemantics as the sequential path.\n\nDocument the Ironic tuning guidance and add a release note that\nframes the startup and resource-reporting improvements in this\nseries as performance bug fixes for large Ironic deployments.\n\nNOTE: This patch had to be slightly re-worked for back-porting: namely\nthread_pool_factory does not exist, so the previous method of using\nnova.utils.{spawn_on,etc} and GreenThreadPoolExecutor is used.\n\nRelated-Bug: 2162924\nGenerated-By: Cursor sonnet 4.6\nChange-Id: I36163947a09b82cfc40ab4b522d82ffb503a0b84\nSigned-off-by: Sean Mooney \u003cwork@seanmooney.info\u003e\nSigned-off-by: Clif Houck \u003cme@clifhouck.com\u003e\n(cherry picked from commit 65394c320127470660b933425990ccabfed487e5)\n","web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/nova/commit/29b521a22ee409a514a757ca2b4866a1566be25e"}],"resolve_conflicts_web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/nova/commit/29b521a22ee409a514a757ca2b4866a1566be25e"}]},"branch":"refs/heads/stable/2025.2"}},"requirements":[],"submit_records":[{"rule_name":"gerrit~DefaultSubmitRule","status":"OK","labels":[{"label":"Verified","status":"MAY","applied_by":{"_account_id":22348,"name":"Zuul","username":"zuul","tags":["SERVICE_USER"]}},{"label":"Code-Review","status":"MAY"},{"label":"Workflow","status":"MAY"},{"label":"Review-Priority","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":"Review-Priority","description":"Review Priority","status":"NOT_APPLICABLE","is_legacy":false,"applicability_expression_result":{"fulfilled":false,"status":"FAIL"},"submittability_expression_result":{"expression":"is:true","fulfilled":true,"status":"NOT_EVALUATED","passing_atoms":[],"failing_atoms":[],"atom_explanations":{}}},{"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":""}}}]}