> ## Documentation Index
> Fetch the complete documentation index at: https://doc.lucidworks.com/llms.txt
> Use this file to discover all available pages before exploring further.

# The Fusion Stack

export const LwTemplate = ({title = "Key questions to get you started", icon = "sparkles", cta = "Powered by Agent Studio", linkHref = "https://lucidworks.com/demo/?utm_source=docs&utm_medium=referral&utm_campaign=docs_cta_ai"}) => {
  const [isLoaded, setIsLoaded] = useState(false);
  useEffect(() => {
    const timer = setTimeout(() => {
      setIsLoaded(true);
    }, 500);
    return () => clearTimeout(timer);
  }, []);
  return <div className="lw-template-container">
      <Card title={title} icon={icon}>
        {isLoaded && <span dangerouslySetInnerHTML={{
    __html: `<lw-template id="a029c1a9-28be-427e-b0e1-5d918920246a"></lw-template
            >`
  }} />}
        <Link href={linkHref} className="agent-studio-link text-left text-gray-600 gap-2 dark:text-gray-400 text-sm font-medium flex flex-row items-center hover:text-primary dark:hover:text-primary-light group-hover:text-primary group-hover:dark:text-primary-light">Powered by Lucidworks Agent Studio</Link>
      </Card>
    </div>;
};

[localhost link]: http://localhost:3000/docs/5/fusion/intro/fusion-stack/overview

[mintlify link]: https://doc.lucidworks.com/docs/5/fusion/intro/fusion-stack/overview

[old doc.lw link]: https://doc.lucidworks.com/fusion/5.9/3212

In addition to Lucidworks' proprietary technology, the Fusion platform incorporates a powerful stack of open source software.

<LwTemplate />

* [Apache Solr](/docs/5/fusion/intro/fusion-stack/solr/overview) is the search engine at the core of Fusion. Solr stores your data in a primary collection for the data your users will search and auxiliary collections for signals, aggregations, and related data.
* [Apache Spark](/docs/5/fusion/intro/fusion-stack/spark/overview) is the cluster-computing framework for large-scale processing jobs. These jobs can be turned into stepwise tasks and distributed across a cluster of computers.
* [Kubernetes](/docs/5/fusion/intro/kubernetes) is used for Fusion as the deployment platform. Fusion runs as a set of microservices on Kubernetes distributions such as AKS, EKS, and GKE.
* [ZooKeeper](/docs/5/fusion/intro/fusion-stack/zookeeper) is a distributed configuration service, synchronization service, and naming registry. Fusion uses a ZooKeeper [microservice](/docs/5/fusion/reference/microservices) to configure and manage all Fusion components in a single Fusion deployment.

<Card title="Fusion Architecture" class="note-image" href="https://academy.lucidworks.com/fusion-architecture" cta="Take this course on the LucidAcademy." icon="graduation-cap" iconType="duotone">
  The course for **Fusion Architecture** focuses on the components that make Fusion a one-of-a-kind search solution.
</Card>