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

# Advanced guides

<Warning>
  **This page is archived.** Fly Postgres (unmanaged) is no longer maintained, and Fly.io Support is not able to provide support or guidance for it. We now offer [Fly.io Managed Postgres](/postgres), our fully-managed database service that handles all aspects of running production PostgreSQL databases.

  These pages are kept for reference and are not listed in the navigation. The full set is indexed on the [Fly Postgres (Unmanaged)](/unmanaged-postgres) page.
</Warning>

Fly.io makes it possible to build out high performance Postgres clusters that are accessible globally, but it does require some consideration and architecture thanks to latency imposed by the speed of light, which is approximately 204,190,477 m/s in a fiber optic cable.

* [High Availability & Global Replication](/unmanaged-postgres/advanced-guides/high-availability-and-global-replication)