Standalone Architecture

Standalone Architecture is simple, easy to maintain, and most budgetary to cost. This architecture is suitable for less critical systems that can accept some downtime to recover or upgrade the system. This architecture has 3 tier components which consist of the Web tier, Application tier, and Database tier as shown in the following diagram.

Web tier - This tier is used to receive a request from the client or load balancer, then process the static content request and forward a business logic request to the Application Server in the Application tier.

Application tier - This tier is used to process the request from the client using Application Server Middleware.

Database tier - This tier is used to persist data into storage.

The Standalone Architecture diagram above is shown as three instances of servers, which is the best virtue for Architecture. You can also separate each component using a firewall or network infrastructure to secure your system and improve performance. But it is not necessary to separate each component (Web, Application, and Database), as these components can also run on the same server but in that case, the server should have enough capacity for all components. You may also choose to separate these into two servers, one for the Web, whereas the Application, and the database on the second server. This decision certainly depends on your resources and your security policy.