4.x: Improve DefaultMetadata's TabletMap tablet invalidation logic #388
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Previously the tablet map would be completely emptied on node removal, necessitating full rebuild of it. With this change the TabletMap will be scanned through on node removals (`RemoveNodeRefresh`) in order to delete only those tablets, that contain removed node as one of the replicas. Additionally we introduce `TabletMapSchemaChangeListener` which will be automatically registered on context initialization as long as schema metadata is enabled. It won't be added if the schema metadata is enabled later at runtime. This listener ensures that relevant tablets will be removed on removals and updates of both keyspaces and tables. The `TabletMapSchemaChangesIT` tests its behaviour. Addresses scylladb#377.
dkropachev
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Nov 29, 2024
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Previously the tablet map would be completely emptied on node removal, necessitating full rebuild of it. With this change the TabletMap will be scanned through on node removals (
RemoveNodeRefresh) in order to delete only those tablets, that contain removed node as one of the replicas.Additionally we introduce
TabletMapSchemaChangeListenerwhich will be automatically registered on context initialization as long as schema metadata is enabled. It won't be added if the schema metadata is enabled later at runtime. This listener ensures that relevant tablets will be removed on removals and updates of both keyspaces and tables. TheTabletMapSchemaChangesITtests its behaviour.Addresses #377.