# Multi-tenant SaaS partitioning models for PostgreSQL
<a name="partitioning-models"></a>

The best method for accomplishing multi-tenancy depends on the requirements for your SaaS application. The following sections demonstrate partitioning models for successfully implementing multi-tenancy in PostgreSQL. 

**Note**  
The models discussed in this section are applicable to both Amazon RDS for PostgreSQL and Aurora PostgreSQL-Compatible. References to *PostgreSQL* in this section apply to both services.

There are three high-level models that you can use in PostgreSQL for SaaS partitioning: silo, bridge, and pool. The following image summarizes the trade-offs between the silo and pool models. The bridge model is a hybrid of the silo and pool models.


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| **Partitioning model** | **Advantages** | **Disadvantages** | 
| --- | --- | --- | 
| Silo | [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/prescriptive-guidance/latest/saas-multitenant-managed-postgresql/partitioning-models.html) | [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/prescriptive-guidance/latest/saas-multitenant-managed-postgresql/partitioning-models.html) | 
| Pool | [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/prescriptive-guidance/latest/saas-multitenant-managed-postgresql/partitioning-models.html) | [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/prescriptive-guidance/latest/saas-multitenant-managed-postgresql/partitioning-models.html) | 
| Bridge | [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/prescriptive-guidance/latest/saas-multitenant-managed-postgresql/partitioning-models.html) | [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/prescriptive-guidance/latest/saas-multitenant-managed-postgresql/partitioning-models.html) | 

The following sections discuss each model in more detail.

**Topics**
+ [PostgreSQL silo model](silo.md)
+ [PostgreSQL pool model](pool.md)
+ [PostgreSQL bridge model](bridge.md)
+ [Decision matrix](matrix.md)