Glossary

Shared terminology used across Marqo systems and docs. Keep entries short and link to the system or repo that owns the concept.

Term	Meaning
Control plane	Management layer: APIs, account/index management, agentic search, integrations, deployment. See Systems → Control Plane.
Data plane	Where indexes run: multitenant EKS, ingest, query, reindexing. See Systems → Data Plane.
Cell	A deployed unit of control-plane infrastructure (AWS/GCP), provisioned via cloud_control_plane_cdk.
Index	A tenant's searchable collection of documents, hosted on the data plane and backed by Vespa.
Agentic search	Conversational/agent-driven search and shopping experience exposed via the ecom/agentic APIs.
Reindexing	Replaying documents into Vespa via the reindexing-pipeline.
Admin API	Operational control-plane API (admin_lambda). See Admin API.
Classic API	Core control-plane "classic" surface (monolith). See Classic API.
Ecommerce API	Customer-facing ecommerce/agentic API. See Ecommerce API.
Vespa	The underlying search engine that stores and serves index data.

Add terms as they come up — prefer linking to the owning system/repo over re-explaining it here.