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# Unified Configuration

HPE DIH is generally installed and operated as a stand-alone component, where you use a separate `dih.cfg` file to configure the HPE DIH. However, in simple testing and training setups you can configure the HPE DIH as part of a unified IDOL Server, by using the `idolserver.cfg` file.

For more details about unified and component setups, refer to the IDOL Getting Started Guide.

In a unified configuration, use the `[DistributionSettings]` section of the `IDOLserver.cfg` file to enter configuration options that normally appear in the `[Server]` section of the `dih.cfg` file for a stand-alone configuration. All other section names are the same in both configuration files.

There are two ways in which to configure HPE DIH for a unified configuration:

- Configure DAH and HPE DIH together.

  - Use the `[DistributionSettings]` section of the `idolserver.cfg` file to set configuration options that normally appear in the `[Server]` section of the `dih.cfg` file for a stand-alone configuration.
  - Use the `[DistributionIDOLServers]` and `[IDOLServerN]` sections to configure the child servers. Refer to the IDOL Server Administration Guide.

  In this type of configuration, all child servers perform both index and ACI actions, and the configuration options that you set apply to both DAH and HPE DIH. For this example, the child servers are stand-alone Content components.

- Configure DAH and HPE DIH separately.

  - Use the `[DistributionSettings]` section of the `idolserver.cfg` file to set general HPE DIH configuration options.
  - Use the `[DAHEngines]` and `[DIHEngines]` sections to configure DAH and HPE DIH child servers respectively. Refer to the IDOL Server Administration Guide and the Distributed Action Handler Administration Guide.

  In this type of configuration, you can configure different child servers to perform indexing or ACI actions exclusively, which permits greater flexibility in administering your system. For example, the HPE DIH can distribute index actions to HPE DIH child servers in a chained distribution setup, while the DAH distributes actions directly to Content servers.

The configuration examples in this guide generally consider HPE DIH as a stand-alone component, with its own configuration file.

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