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How does Lemmy/Mastodon/Fediverse store videos and images? (programming.dev)

submitted 1 year ago by Blurker@programming.dev to c/asklemmy@lemmy.ml

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As I was browsing lemmy and the fediverse at large, this question kept popping into my head.

Since multimedia files have a much bigger footprint than raw text, it made me feel worried since as time goes, massive resources will be needed to keep up with the big data coming in.

I do wonder if the instances have taken the route of the cloud and just decided to put all of it in something like AWS S3? Or maybe they use self hosted storage with something like minio for object storage?

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[–] rcmaehl@lemmy.world 14 points 1 year ago* (last edited 1 year ago) (14 children)

Edit: I am partially wrong. (See below)

They're stored on their host Instance. Only text is copied across instances.

[–] Blurker@programming.dev 2 points 1 year ago (1 children)

That sounds good for reliability since an instance can still lookup posts even if another fails.

For videos and images, do they store them as blobs in the database or do they use something more catered to files like object storage or maybe a regular filesystem with metadata on a database?

[–] rcmaehl@lemmy.world 4 points 1 year ago (1 children)

They use pict-rs which looks like it was file system, but is now object storage

[–] Blurker@programming.dev 2 points 1 year ago

That's an awesome name. The Rust community never fails to deliver lol

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