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15.2. Cell-specific components and services
The following components are deployed in each Compute cell.
- Cell database
- Contains most of the information about instances. Used by the global API, the conductor, and the Compute services.
- Coordinates database queries and long-running tasks from the global services, and insulates Compute nodes from direct database access.
- Message queue
- Messaging service used by all services to communicate with each other within the cell and with the global services.