The bucket index is a per-tenant file containing the list of blocks and block deletion marks in the storage. The bucket index itself is stored in the backend object storage, is periodically updated by the compactor, and used by queriers, store-gateways and rulers to discover blocks in the storage. The bucket index usage is optional and can be enabled via -blocks-storage.bucket-store.bucket-index.enabled=true (or its respective YAML config option). Benefits The querier, store-gateway and ruler...
