The ADX software supports a unified or a split configuration. If the ADX and its accompanying SQL Server database software is installed on one computer, it is known as a unified ADX. If the SQL Server software is located on a different computer, it is known as a split ADX.
The ADX split configuration provides the ADX software/user interface on one computer (the web/application server computer) and the alarm, audit, annotations, and historical trend data on another computer with Microsoft SQL Server software (the database server computer). See the following figure for details.
Figure 2 shows at a high level the difference between the unified and split ADX configurations. Split ADX configurations are supported for 10-, 25-, 50-, or 100-user ADXs. For example, if you require your database server to be separate from your application servers, you may want to use an ADX split configuration.
