You can quickly install and run Fusion on your laptop to explore its features and work with sample data. See Getting Started for quick start instructions.
The simplest possible architecture is the one you get out of the box, by unpacking the tarball and running
$FUSION/bin/fusion start, so that all components are running on a single host in their default configurations. When developing with Fusion, you’ll need to know its basic architecture and port usage:
Fusion is designed for flexible, distributed deployment. Any of its components can be distributed across your network, and some can be clustered. A production deployment usually requires multiple Fusion nodes, each of which runs some or all Fusion services.
If you already have SolrCloud clusters managing your data, you can integrate them into a Fusion deployment using ZooKeeper.