The data sits in silos, locked behind the lines you draw. Each domain holds its own truth, its own risk, and its own regulatory weight. GDPR compliance isn’t a checklist—it’s architecture. Domain-based resource separation is the frame that keeps every byte exactly where it belongs.
Under GDPR, personal data must be processed for specific purposes and kept isolated from unrelated scopes. Mixing data across domains—whether subdomains, microservices, or multi-tenancy layers—can breach lawful processing principles. Domain-based separation enforces boundaries at the infrastructure and application level, so each resource is only accessible within its intended domain. That means clear access policies, strict routing rules, and no ambiguity about who can see what.
This approach starts with defining domain boundaries early. Each domain gets its own datastore, its own user permissions, and its own data handling logic. Cross-domain calls are explicit, logged, and justified under GDPR’s lawful basis requirements. Data retention policies are scoped to the domain, so removal or anonymization is surgical, not broad. The resource separation model makes compliance auditable—logs and configurations show exactly how isolation is enforced.