Mastering ArcGIS Enterprise Administration

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Multi-machine (multi-tiered) deployment

The multi-machine, or multi-tiered (where each machine is a tier), is the most common deployment scenario. Here, each component of ArcGIS Enterprise is installed on a separate virtual or physical machine. This means that there is a separate machine for each of the following:

ArcGIS Web Adaptor (web server)
Portal for ArcGIS
ArcGIS Server
ArcGIS Data Store
Enterprise geodatabase

If absolutely necessary, Portal and the Web Adaptor can reside on one server, with ArcGIS Server and Data Store on another. Bear in mind that, for performance reasons, this is not what is recommended for production environments.

Although more complex than the single-machine deployment, the multi-tiered deployment allows for isolation of the different components and distribution of the workload. A multi-machine configuration would conceptually look like the following diagram:

Hardware virtualization, utilized today by even the smallest of organizations, makes having and utilizing a multi-tiered deployment feasible.

Within the multi-tiered deployment, it is possible to have multiple ArcGIS Server machines functioning as a single logical unit. These servers operate in conjunction with the ArcGIS Web Adaptor to form a collective unit referred to as an ArcGIS Server site. Within a site, all ArcGIS Servers share the same configuration store and ArcGIS Server directories. Once configured, the site can be administered from any of the servers within it. For more information on ArcGIS Enterprise deployment scenarios, consult the online documentation.