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server: (router) move model downloading to dedicated process (#24834)

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* server: real-time model load progress tracking via /models/sse

* update docs

* server: move model download to child process

* rm unused

* fix most problems

* clean up

* nit fixes

* fix test case

* do not detact() thread

* shorter MODEL_DOWNLOAD_TIMEOUT in test

* throttle
This commit is contained in:
Xuan-Son Nguyen
2026-06-22 18:24:04 +02:00
committed by GitHub
parent 6ee0f65793
commit 721354fbdf
9 changed files with 312 additions and 152 deletions
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tools/server/README-dev.md
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@@ -204,9 +204,9 @@ Instead of building everything from the ground up (like what most AI agents will
The flow for downloading a new model:
- POST request comes in --> `post_router_models` --> validation
- `server_models::download()` is called
- Sets up a new thread `inst.th` and runs the download inside
- If a stop request comes in, set `stop_download` to `true`
- A new `llama-server` subprocess will be spawned with special `SERVER_CHILD_MODE_DOWNLOAD`
- Child process runs the download and report status back to router via stdin/out
- If a stop request comes in, the router asks the child process to stop (same mechanism as running a model in child process)
- Otherwise, upon completion, we call `load_models()` to refresh the list of models
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