A cluster consists of a set of connected systems (nodes) that work together, and in many ways can be viewed as a single system. The nodes of a cluster are usually connected through local area networks, with each node running its own instance of the same operating system.
An Interana cluster consists of the following nodes that can be deployed on a single device or multiple devices:
- config node — Node from which you administer the cluster. MySQL database (DB) is only installed on this node for storage of Interana metadata. Configure this node first.
- api node — Serves the Interana application, merges query results from data and string nodes, and then presents those results to the user. Nginx is only installed on the api node.
- ingest node — Connects to data repositories (S3, Azure, local file system), downloads new files, processes the data and then sends to data and string tiers, as appropriate.
- data node — Data storage, must have enough space to accommodate all events and stream simultaneous query results.
- string node — String storage for the active strings in the dataset, stored in compressed format. Requires sufficient memory to hold the working set of strings accessed during queries.
- listener node — Streams live data from the web or cloud, also known as streaming ingest. This node is optional during installation.