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      Sync Gateway is the synchronization server in a Couchbase Mobile deployment.

      Couchbase Mobile brings the power of NoSQL to the edge and is comprised of three components:

      • Couchbase Lite, an embedded, NoSQL JSON Document Style database for your mobile apps

      • Sync Gateway, an internet-facing synchronization mechanism that securely syncs data between mobile clients and server, and

      • Couchbase Server, a highly scalable, distributed NoSQL database platform

      The following diagram describes the architecture for a typical deployment comprised of Couchbase Lite, Couchbase Server SDKs, Sync Gateway, and Couchbase Server.

      cbm architecture

      Sync Gateway is designed to provide data synchronization for large-scale interactive web, mobile, and IoT applications. Amongst its most important and commonly used features is secure Access Control.

      Sync Gateway assures secure access control using:

      • User authentication, which ensures that only authorized users can connect to Sync Gateway.

      • Data Routing

        This ensures that authorized users can only access documents in those Sync Gateway Channel(s) assigned to them and only in accordance with their assigned privileges. You can set those privileges to confer Read Access and-or Write Access as required.

        The business logic behind the validation and authorization of document access is provided by the customizable Sync Function.