> For the complete documentation index, see [llms.txt](https://documentation.alluxio.io/ee-ai-en/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://documentation.alluxio.io/ee-ai-en/high-availability.md).

# High Availability

Alluxio is designed to be resilient and ensure data is always available, even in the face of component or infrastructure failures.

* [**UFS Fallback**](/ee-ai-en/high-availability/ufs-fallback.md): If an Alluxio worker is unavailable, clients can automatically fall back to reading directly from the UFS, ensuring that read requests succeed without interruption.
* [**File Replication**](/ee-ai-en/high-availability/multiple-replicas.md): Configure files to have multiple replicas across different Alluxio workers. If one worker becomes unavailable, clients can seamlessly fail over to another replica. This also boosts read performance for popular files by distributing the load.
* [**Multi-Availability Zone (Multi-AZ) Deployments**](/ee-ai-en/high-availability/multi-az.md): Deploy Alluxio clusters across multiple availability zones (AZs). If an entire AZ goes down, clients can automatically fail over to an Alluxio cluster in another AZ, providing robust disaster recovery and uninterrupted service.


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