Solr supports both single and multi node installations:

  • A single node installation is a single instance of Solr running on a server, with all indexing information maintained in the single instance.
  • A multi node installation consists of two or more instances of Solr executing on different servers, with the indexing information spread across all instances.

The setup and maintenance of multi node installations is complex and time consuming and typically only required where the amount of data indexed is in the hundreds of gigabytes range. In most cases, the amount of indexing information required by EMu only requires a single node setup.

To keep things simple and to reduce network latency it is recommended that Solr runs on the same server as the EMu system. The following instructions describe how to setup such a system: