what is Salesforce Architecture ?

The architecture of Salesforce can be put into layers for better understanding. The purpose and function of each layer is described below −

Trusted Multitenant Cloud
Here multiple instances of one or multiple applications operate independently in a shared environment. The instances are referred as tenants and they logically separate from each other while physically remaining in the same hardware. It is called trusted because of both its robust nature and high security.

Scalable Metadata Platform
The metadata-driven platform makes it easy for customization and scaling up as the amount of data or concurrent user instances increase.

Enterprise Ecosystem
The Enterprise Ecosystem of Sales is very large as a large number of partners contribute by creating and maintaining applications in this platform.

CRM and Related Functionality
Salesforce includes all aspects of CRM in its list of features and also extends it by providing features for creation of apps and integrating analytics, etc.

APIs
Salesforce provides a powerful suite of APIs. This helps to develop and customize the Salesforce1 Mobile App.