# Replit — Using Tvix Store to Reduce Nix Storage Costs by 90%

- Company: Replit (replit.com)
- Announced: 2025-03-06T04:46:22+00:00
- Category: not stated
- Coverage: not counted
- Announcement: no
- Group: routine
- Source: https://replit.com/blog/tvix-store
- Record: https://forck.live/items/17981-using-tvix-store-to-reduce-nix-storage-costs-by-90
- Subject: Replit Agent

Replit implemented Tvix Store, a content-addressed Nix store implementation, to compress its 6TB cache of Nix store paths into 1.2TB, reducing storage costs for the persistent disk cache by 90%. The implementation uses a FUSE filesystem to expose the compressed store while maintaining backward compatibility for older packages.

## Evidence

Verbatim from https://replit.com/blog/tvix-store:

> By implementing this, we were able to compress our 6Tb cache of Nix store paths into 1.2Tb. In doing so, we also reduced out storage cost for the persistent disk cache by 90%.

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Record: https://forck.live/items/17981-using-tvix-store-to-reduce-nix-storage-costs-by-90
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