Any of you have a self-hosted AI "hub"? (e.g. for LLM, stable-diffusion, ...)

robber@lemmy.ml to Selfhosted@lemmy.world – 62 points –

I've been looking into self-hosting LLMs or stable diffusion models using something like LocalAI and / or Ollama and LibreChat.

Some questions to get a nice discussion going:

  • Any of you have experience with this?
  • What are your motivations?
  • What are you using in terms of hardware?
  • Considerations regarding energy efficiency and associated costs?
  • What about renting a GPU? Privacy implications?
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So you access the models directly via terminal? Is that convenient? Also, do you get satisfying inference speed and quality with a 16GB card?

Mostly via terminal, yeah. It's convenient when you're used to it - I am.

Let's see, my inference speed now is:

  • ~60-65 tok/s for a 8B model in Q_5_K/Q6_K (entirely in VRAM);
  • ~36 tok/s for a 14B model in Q6_K (entirely in VRAM);
  • ~4.5 tok/s for a 35B model in Q5_K_M (16/41 layers in VRAM);
  • ~12.5 tok/s for a 8x7B model in Q4_K_M (18/33 layers in VRAM);
  • ~4.5 tok/s for a 70B model in Q2_K (44/81 layers in VRAM);
  • ~2.5 tok/s for a 70B model in Q3_K_L (28/81 layers in VRAM).

As of quality, I try to avoid quantisation below Q5 or at least Q4. I also don't see any point in using Q8/f16/f32 - the difference with Q6 is minimal. Other than that, it really depends on the model - for instance, llama-3 8B is smarter than many older 30B+ models.

Thanks! Glad to see the 8x7B performing not too bad - I assume that's a Mistral model? Also, does the CPU significantly affect inference speed in such a setup, do you know?

If your CPU isn't ancient, it's mostly about memory speed. VRAM is very fast, DDR5 RAM is reasonably fast, swap is slow even on a modern SSD.

8x7B is mixtral, yeah.