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· 6 min read
Jamie Dborin

End to End Tooling For Data Scientists

Its has never been more exciting, rewarding, and challenging to be a data scientist. Advancements in foundation models have enabled new applications to be built in text, image, and multimodal domains. However this has come with a cost. The infrastructural challenges of working with large foundation models are larger than they have ever been. Data scientists are increasingly asked to become experts in building and managing the infrastructure needed to train and serve large foundation models, while also deeply understanding and modelling the data in front of them.

It is going to be increasingly important for data scientists to be equipped with the right tools, so they can manage the growing infrastructural demands of modern deep learning while still being able to focus on the core skill set of data science. DeterminedAI and Titan Takeoff are two such tools which take a data scientist the full distance training to model serving.

In this article we will show how to fine tune a generative model (GPT2) on your own data using Determined, and then efficiently serve it on GPU with int8 quantization using Takeoff.

Overview

To demonstrate how to use the Takeoff server with models trained using Determined we will walk through an example. We will be doing the following:

  1. Training a GPT2 model with DeterminedAI
  2. Downloading the saved checkpoint and converting it to a format that Takeoff can use.
  3. Deploying the model with Titan Takeoff.

Both DeterminedAI and Titan Takeoff are easy to use and don’t require a lot of code or configuration to get started. The trickiest step is mapping the weights that are downloaded by Determined to a format that Takeoff accepts. Let's delve into an end-to-end tutorial for transitioning from DeterminedAI to Titan Takeoff.

End-to-End Demo

Step 1. Model Training

Prerequisites: Setting Up the Environment for DeterminedAI and Titan Takeoff

To set up the necessary packages, use the following pip commands:

pip install determined
pip install titan-iris

Step 1: Deploy a Local Cluster Using DeterminedAI

det deploy local cluster-up

Once the cluster is active, navigate to localhost:8080 to view all experiment data and cluster details.

The default credentials are:

Username: admin

Password: None

Step 2: Initiate a Finetuning Experiment with DeterminedAI

For this demonstration, we'll utilize an example from DeterminedAI's Official Documentation.

This fine-tunes GPT2 on wikitext-2, a dataset created by scraping Wikipedia.

Download the language-modeling.tgz file and extract its contents.

You can do this on linux using tar :

tar zxvf language-modeling.tgz

This will extract the contents to a folder called /language-modeling . Navigate to the folder and there should be a config file: /language-modeling/clm_config.yaml.

Be sure to set the correct number of GPUs for your machine in clm_config.yaml

resources:
slots_per_trial: <your number of gpus>

To initiate the fine tuning job, navigate to the folder with the yaml and run the experiment create command:

cd language-modeling
det experiment create -f clm_config.yaml .

After the task is successfully dispatched we can view all the training info and stats on the same dashboard as before at localhost:8080. This is also where we track the training progress and view other relevant details. After this, just wait for the training to complete.

Step 2: Model Conversion

Now that training is done we need to download to the model.

  1. Navigate to the Checkpoints Under your experiment:

A picture of the determined model storage.

Record the UUID for the checkpoint you would like to download.

  1. Use the following command to download the model:
det checkpoint download <your_checkpoint_model_uuid>
  1. Converting to the HuggingFace Model Format

Once downloaded, the model can be found in the checkpoints folder, identified by its unique UUID. The model weights are saved in the state_dict.pth file. Our next task is to convert this model into the HuggingFace format. This is done by initializing a model using the HuggingFace transformers package, loading the weights into the model class, and then saving it to a directory.

Here's a script to guide you through this process:

import torch
from transformers import GPT2LMHeadModel, GPT2Tokenizer

checkpoint = torch.load('checkpoints/<your_checkpoint_model_uuid>/state_dict.pth')
model_state_dict = dict(checkpoint['models_state_dict'][0])

# Remove unexpected keys from state_dict_as_dict
unexpected_keys = [
"transformer.h." + str(i) + ".attn.bias" for i in range(12)
] + [
"transformer.h." + str(i) + ".attn.masked_bias" for i in range(12)
]

for key in unexpected_keys:
if key in model_state_dict:
del model_state_dict[key]

model = GPT2LMHeadModel.from_pretrained('gpt2') # Instantiate GPT-2 model
model.load_state_dict(model_state_dict) # Load your weights
tokenizer = GPT2Tokenizer.from_pretrained('gpt2') # Instantiate tokenizer

model.save_pretrained('gpt2_hf') # Save model to gpt2_hf
tokenizer.save_pretrained('gpt2_hf') # Save tokenizer to gpt2_hf

We need to remove some weights since the model used by Determined has a different set of weights as the Huggingface implementation of GPT2.

Once the model and tokenizer are saved in the 'gpt2_hf' directory, the conversion phase is complete!

Step 3: Model Deployment

Moving the Fine-tuned Model

Deploying the fine-tuned model on the Titan Takeoff server is easy. Begin by moving or copying the model's folder to ~/.takeoff_cache. On a Linux system, this can be accomplished with:

cp -r gpt_hf ~/.takeoff_cache

Deploy with Titan Takeoff

To deploy your model, simply use the following command:

iris takeoff --model gpt_hf --device cuda

The --device flag is optional. If you omit this argument, the model will run on the CPU by default. Once executed, you'll have an optimized GPT-2 model running on your local server.

Using the takeoff server you have the option to deploy using a range of quantization types, from bfloat16 to int4, on cpu and gpu, optimized for throughput or latency as needed. This makes it easy to take advantage of all the hardware available to data science teams, and be able to build high performance, scalable applications on top of LLMs.

Model Inference

You can inference the model using the API:

curl http://localhost:8000/generate_stream \
-X POST \
-N \
-H "Content-Type: application/json" \
-d '{"text":"List 3 things you can do in London"}'

Or using the Playground interface at localhost:8000/demos/playground :

A picture of the Titan Playgorund software. It is a dark blue screen with text on it to interact with LLMs.

For more detailed guidance and advanced features, refer to the Takeoff Docs.

Wrapping Up

To wrap things up, we have seen the seamless integration of DeterminedAI and Titan Takeoff allows for a smooth transition from model training to deployment. With a three-phase process that involves model training, conversion, and deployment, users can easily transition from a DeterminedAI-trained model to being fully operational with Titan Takeoff. Keep this guide handy, and remember: from training wheels to full throttle, your model's journey has never been this streamlined! 🚀

· 12 min read
Fergus Finn

Large Language Models (LLMs) are a transformative new technology that have great potential to transform the way that we build software. They generate text, answer questions, and write code. However, deploying these models remains challenging due to their size and the substantial compute resources they require. This post is focused on using two infrastructure tools, Docker and Kubernetes, to deploy Titan Takeoff, a docker image that bundles optimization and serving technology specifically designed for LLMs. We're following on from our primer where we give an introduction to Docker and Kubernetes, and explain how they can be used to deploy machine learning models.

· 4 min read
Fergus Finn

In the present age, large language models are shaping our world in ways we never anticipated. They generate text, answer questions, and are even writing code. The power they possess to revolutionize the way we live our lives is profound. However, deploying these behemoths is a challenge. They're big, they demand significant compute resources to function, and the field of MLOps, which focuses on applying DevOps practices to machine learning workflows, is complex and still being explored.

In this blog post, we're going to introduce a crucial building block of modern MLOps - the container - and dive into a popular container orchestrator called Kubernetes. Let's start our journey into this exciting world.

· 10 min read
Fergus Finn

Hi! In the last post, we deployed a simple LLM endpoint using the Titan Takeoff server using an AWS EC2 instance. We compared performance between a GPU enabled instance and a CPU only instance, and between the Takeoff server, and raw huggingface/pytorch. In this post, we'll look at another cloud provider, and try out their tooling for deploying LLM endpoints. We'll use the same Takeoff server, but this time we'll deploy it using Google Cloud, specifically, their Google Cloud Run service . On the way, we'll discuss a little bit about serverless, and how the Takeoff server means that we can use serverless tools to deploy LLM endpoints.