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Database Architectural Patterns For Multi-Tenant SaaS Applications

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Database Architectural Patterns For Multi-Tenant SaaS Applications

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MULTI-TENANT VS SINGLE-TENANT

In multi-tenant architecture, a single instance of the application serves multiple customers who all either share a database or have their own databases.

VS

In single-tenant architecture, a single database supports a single instance of the software.

THE THREE APPROACHES TO MULTI-TENANT ARCHITECTURE

The three approaches that can be followed in the case of multi-tenant architecture are:
Separate databases, separate schema
Shared database, separate schema
Shared database, shared schema

SEPARATE DATABASES, SEPARATE SCHEMA
This architecture ensures the highest level of data security where every tenant has its own database instance physically
separated. One tenant cannot access data for the other tenants.

SHARED DATABASE, SEPARATE SCHEMA
This architecture serves multiple tenants under the same database, where each tenant has its own set of tables grouped by schema created specifically for that tenant.

SHARED DATABASE, SHARED SCHEMA
This architecture involves using the same database and the same set of tables/schema to host multiple tenant data. A Tenant ID associates each tenant with the rows that it owns.

PROS AND CONS

Security
Separate Databases, Separate Schema-High
Shared Database, Separate Schema-Medium
Shared Database, Shared Schema-Low

Flexibility
Separate Databases, Separate Schema-High
Shared Database, Separate Schema-Medium
Shared Database, Shared Schema-Low

Cost
Separate Databases, Separate Schema-High
Shared Database, Separate Schema-Medium
Shared Database, Shared Schema-Low

Maintenance
Separate Databases, Separate Schema-High
Shared Database, Separate Schema-Medium
Shared Database, Shared Schema-Low

KEEP IN MIND:

When thinking about the correct approach, carefully consider:

The number of tenants
Amount of stored data
Security requirements

CONCLUSION
Multi-tenant architecture gives the power and versatility to build an application with resource sharing in mind.

If you’d like help developing your multi-tenant software, contact us or visit here –

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