A Data Storage Architecture Supporting Multi-level Customization for SaaS

In a traditional SaaS application, there is only a virtualized application for a tenant, but in some situations a tenant requires customizing with a SaaS application out of more than one virtualized application and run multiple business applications simultaneously. According to the traditional way, the tenant has to rent and customize with the same SaaS application many times, which results in a lot of repeated custom operations and duplication of custom metadata. In this paper we design a novel metadata-driven schema-sharing data storage architecture for multi-level Customization in SaaS applications, which supports sharing custom metadata in a tenant domain, reduces duplication of customization, and facilitates unified management of a tenant´s institutions, users, roles, code, business applications, business data, etc.