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Fiorano API management architecture scales linearly, allowing the infrastructure to grow on an as-needed basis. The classification of gateway servers into Server Groups allows scaling a natural process. 

The project deployment is linked to server groups rather than the physical servers, which facilitates flexible deployment patterns. 

Scaling

Configuring a Server Group with Single Server

Perhaps the simplest form of configuring a Server Group is to map only a single physical gateway server. Create a Server Group with the name 'GatewayServer' by following the steps mentioned in the Creating a Server Group for Project Deployment section. Similarly, add another server group with the name 'GatewayServer1'. In this example, apigateway and apigateway1 are added for GatewayServer and GatewayServer1 respectively.

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Server Groups - Production and Development exist by default with servers apigateway1 and apigateway allotted to them respectively. These servers can be used by using edit button and then moving between Servers and Availabe Servers sections.

There is no distinction between server group and server in this case. So the IP of the server can be directly made available to the clients.


Figure 1: Adding Gateway Servers

As and when the load on the Servers increase, there are multiple ways to cope with the increased traffic which typically would involve increasing the system resources allocated to the server like memory and CPU. These processes generally incur some downtime for services. The concept of Server Groups provides a way to scale in such scenarios without any downtime. 

Adding Multiple Servers to Server Groups

To scale with increased traffic without any downtime, a new server instance can be  started. Then, from the dashboard, add the server to the Server Group on which the increased activity is observed. 


Figure 2: Adding new server to the Server Group with more activity

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All the projects that are deployed in the server group get automatically deployed on the new server that is added without any manual intervention. 

Load Balancer

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When multiple servers are part of a server group, a load balancer must be used to balance requests across the servers.

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