Should a separate database be built or use a common Ozon assets database? Which technology to choose?

The choice between a separate database and using Ozon's shared asset database depends on several factors:

• Volume and nature of data: If the data is specific to your project and requires a particular structure or frequent changes, a separate database may be more convenient.
• Integration and consistency: A shared database provides a single source of truth and simplifies integration with other Ozon services.
• Performance and load: Under high loads, a separate database can help distribute the load.
• Security and access: A separate database allows more flexible access rights management.

Regarding technology, the choice depends on the requirements:

• For structured data with clear relationships — relational DBMS (PostgreSQL, MySQL).
• For flexible schemas and scalability — NoSQL (MongoDB, Cassandra).
• For high-performance key-value stores — Redis.

If Ozon provides a shared database with an API that meets performance and security requirements, it is reasonable to use it to avoid duplication and simplify maintenance. Otherwise, consider a separate solution with an appropriate technology, taking scalability and integration into account.