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Edge Server can host multiple Ditto applications in a single instance, allowing you to manage different data namespaces and sync configurations from one server.

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Use Cases

  • Multi-tenant deployments: Isolate data for different customers or departments
  • Development environments: Run staging and production apps side-by-side
  • Migration scenarios: Transition between app versions gradually
  • Data isolation: Keep different data types completely separated

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Configuration

Define multiple database resources in your configuration file, each with its own db_id and authentication settings. Each app can have its own subscriptions, HTTP servers, and transport configurations: 
resources:
  # First app
  app1_db:
    resource_type: DittoDatabase
    db_id: "APP_ID_1"
    device_name: "edge-server-app1"
    subscriptions:
      - "SELECT * FROM collection1"
    auth:
      small_peers_only:
        offline_license_token: "TOKEN_1"
  
  # Second app
  app2_db:
    resource_type: DittoDatabase
    db_id: "APP_ID_2"
    device_name: "edge-server-app2"
    subscriptions:
      - "SELECT * FROM collection2"
    auth:
      server:
        access_token: "TOKEN_2"
        auth_url: "https://auth-url-2.cloud.dittolive.app"
        provider: "__playgroundProvider"
  
  # HTTP servers for each app
  app1_http:
    resource_type: HttpServer
    db_id: "APP_ID_1"
    base_path: app1
    http_api: true
    listen_addr: "0.0.0.0:8081"
  
  app2_http:
    resource_type: HttpServer
    db_id: "APP_ID_2"
    base_path: app2
    http_api: true
    listen_addr: "0.0.0.0:8082"

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Key Considerations

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Separate Persistence

By default, each app will use its own persistence directory to avoid data conflicts:
  • app1 → /ditto_APP_ID_1
  • app2 → /ditto_APP_ID_2

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Different Ports

If exposing HTTP APIs, you must use different ports for each app. In the future this will be consolidated into one HTTP server while respecting the defined namespaces.
  • app1 → port 8081
  • app2 → port 8082

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Independent Auth

Each app can have its own authentication configuration:
  • Small peers only mode
  • Cloud sync with different credentials