Storage Service

The VWO Go SDK uses the Gateway Service for caching and storage. Unlike some other SDKs, the Go SDK does not provide a separate storage interface for custom implementations.

Gateway Service Storage

The Gateway Service handles caching and storage of:

Feature flag configurations
User-specific variation assignments
Metrics data

This centralized storage approach ensures consistency across your application instances and reduces the load on VWO's servers.

Benefits

Improved Performance: The Gateway Service caches data, reducing the need for frequent API calls to VWO servers.
Consistency: All instances of your application connect to the same Gateway Service, ensuring consistent feature flag evaluations.
Real-time Updates: The Gateway Service can receive real-time updates from VWO, ensuring your application always has the latest configuration.

Configuration

The storage configuration is handled automatically when you set up the Gateway Service. Ensure you've properly configured the Gateway Service URL when initializing the SDK:

# options for initializing SDK
options = {
    sdk_key: 'your_sdk_key',
    account_id: 'your_account_id',
    gateway_service_url: 'http://your.host.com:port', # check section - How to Setup Gateway Service - for more details
}

# Initialize VWO
vwo_instance = VWO.init(options)

For more information on setting up and configuring the Gateway Service, refer to the Gateway Service documentation.