Below we describe the different software modules which together make up a RegattaDB system. A module is an independently deployable user-mode process that handles a specific functional role within the distributed database architecture.
In total, the architecture comprises six distinct modules. Each deployment includes a combination of these modules, distributed across one or more nodes.
A node is the fundamental compute unit in a RegattaDB deployment. It represents a server that provides CPU, memory, networking, and storage resources to the cluster. A node may be a physical server, a virtual machine (VM), or a container, and may host one or more RegattaDB modules.
Management Modules
These modules form the administrative framework of the cluster, providing the tools necessary to configure, monitor, and maintain the system infrastructure. The management modules are deployed as systemd services. They are responsible for starting, stopping, monitoring, and managing the lifecycle of the operational modules.
SM – System Manager
System Manager handles the deployment of RegattaDB on all nodes. After deployment, it manages both hardware and software resources, executes administrative commands, and coordinates ongoing system operations.
SNA – System Node Agent
The System Node Agent runs on each node where a RegattaDB module is deployed and serves as the local execution layer for the System Manager. It is responsible for managing the lifecycle of all RegattaDB modules on that node.
Operational Modules
These modules drive the core database engine, handling active workloads, maintaining data consistency, and managing the relational schema.
RDB – Regatta Database
The RDB module is RegattaDB’s distributed compute engine, responsible for query execution and data processing. It leverages CPU, network, and I/O resources efficiently, and scales by adding additional RDB modules.
Sequencer
Coordinates consistency of the distributed transactions and snapshots between all RegattaDB modules.
DCM – Database Catalog Manager
Manages the database catalog which contains all the schema definitions including tables indexes and their attributes.
GDD – Global Deadlock Detector
The Global Deadlock Detector (GDD) component is responsible for detecting circular distributed dependencies between transactions in the system and resolving them. 
