README.md

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# NVIDIA Dynamo

High-throughput, low-latency inference framework designed for serving generative AI and reasoning models in multi-node distributed environments.

## Framework Support Matrix

| Feature                                                              | [vLLM](docs/backends/vllm/README.md) | [SGLang](docs/backends/sglang/README.md) | [TensorRT-LLM](docs/backends/trtllm/README.md) |
| -------------------------------------------------------------------- | :--: | :----: | :----------: |
| [**Disaggregated Serving**](docs/design_docs/disagg_serving.md)      | ✅   | ✅     | ✅           |
| [**KV-Aware Routing**](docs/router/kv_cache_routing.md)              | ✅   | ✅     | ✅           |
| [**SLA-Based Planner**](docs/planner/sla_planner.md)                 | ✅   | ✅     | ✅           |
| [**KVBM**](docs/kvbm/kvbm_architecture.md)                           | ✅   | 🚧     | ✅           |
| [**Multimodal**](docs/multimodal/index.md)                           | ✅   | ✅     | ✅           |
| [**Tool Calling**](docs/agents/tool-calling.md)                      | ✅   | ✅     | ✅           |

> **[Full Feature Matrix →](feature-matrix.md)** — Detailed compatibility including LoRA, Request Migration, Speculative Decoding, and feature interactions.

## Latest News

- [12/05] [Moonshot AI's Kimi K2 achieves 10x inference speedup with Dynamo on GB200](https://quantumzeitgeist.com/kimi-k2-nvidia-ai-ai-breakthrough/)
- [12/02] [Mistral AI runs Mistral Large 3 with 10x faster inference using Dynamo](https://www.marktechpost.com/2025/12/02/nvidia-and-mistral-ai-bring-10x-faster-inference-for-the-mistral-3-family-on-gb200-nvl72-gpu-systems/)
- [12/01] [InfoQ: NVIDIA Dynamo simplifies Kubernetes deployment for LLM inference](https://www.infoq.com/news/2025/12/nvidia-dynamo-kubernetes/)
- [11/20] [Dell integrates PowerScale with Dynamo's NIXL for 19x faster TTFT](https://www.dell.com/en-us/dt/corporate/newsroom/announcements/detailpage.press-releases~usa~2025~11~dell-technologies-and-nvidia-advance-enterprise-ai-innovation.htm)
- [11/20] [WEKA partners with NVIDIA on KV cache storage for Dynamo](https://siliconangle.com/2025/11/20/nvidia-weka-kv-cache-solution-ai-inferencing-sc25/)
- [11/13] [Dynamo Office Hours Playlist](https://www.youtube.com/playlist?list=PL5B692fm6--tgryKu94h2Zb7jTFM3Go4X)
- [10/16] [How Baseten achieved 2x faster inference with NVIDIA Dynamo](https://www.baseten.co/blog/how-baseten-achieved-2x-faster-inference-with-nvidia-dynamo/)

## The Era of Multi-GPU, Multi-Node

<p align="center">
  <img src="./docs/images/frontpage-gpu-vertical.png" alt="Multi Node Multi-GPU topology" width="600" />
</p>

Large language models are quickly outgrowing the memory and compute budget of any single GPU. Tensor-parallelism solves the capacity problem by spreading each layer across many GPUs—and sometimes many servers—but it creates a new one: how do you coordinate those shards, route requests, and share KV cache fast enough to feel like one accelerator? This orchestration gap is exactly what NVIDIA Dynamo is built to close.

Dynamo is designed to be inference engine agnostic (supports TRT-LLM, vLLM, SGLang or others) and captures LLM-specific capabilities such as:

- **Disaggregated prefill & decode inference** – Maximizes GPU throughput and facilitates trade off between throughput and latency.
- **Dynamic GPU scheduling** – Optimizes performance based on fluctuating demand
- **LLM-aware request routing** – Eliminates unnecessary KV cache re-computation
- **Accelerated data transfer** – Reduces inference response time using NIXL.
- **KV cache offloading** – Leverages multiple memory hierarchies for higher system throughput

<p align="center">
  <img src="./docs/images/frontpage-architecture.png" alt="Dynamo architecture" width="600" />
</p>

Built in Rust for performance and in Python for extensibility, Dynamo is fully open-source and driven by a transparent, OSS (Open Source Software) first development approach.

# Installation

The following examples require a few system level packages.
Recommended to use Ubuntu 24.04 with a x86_64 CPU. See [docs/reference/support-matrix.md](docs/reference/support-matrix.md)

## 1. Initial setup

The Dynamo team recommends the `uv` Python package manager, although any way works. Install uv:

```
curl -LsSf https://astral.sh/uv/install.sh | sh
```

### Install Python development headers

Backend engines require Python development headers for JIT compilation. Install them with:

```bash
sudo apt install python3-dev
```

## 2. Select an engine

We publish Python wheels specialized for each of our supported engines: vllm, sglang, and trtllm. The examples that follow use SGLang; continue reading for other engines.

```
uv venv venv
source venv/bin/activate
uv pip install pip

# Choose one
uv pip install "ai-dynamo[sglang]"  #replace with [vllm], [trtllm], etc.
```

## 3. Run Dynamo

### Sanity check (optional)

Before trying out Dynamo, you can verify your system configuration and dependencies:

```bash
./deploy/sanity_check.py
```

This is a quick check for system resources, development tools, LLM frameworks, and Dynamo components.

### Running an LLM API server

Dynamo provides a simple way to spin up a local set of inference components including:

- **OpenAI Compatible Frontend** – High performance OpenAI compatible http api server written in Rust.
- **Basic and Kv Aware Router** – Route and load balance traffic to a set of workers.
- **Workers** – Set of pre-configured LLM serving engines.

```
# Start an OpenAI compatible HTTP server with prompt templating, tokenization, and routing.
# Pass the TLS certificate and key paths to use HTTPS instead of HTTP.
# Pass --store-kv to use the filesystem instead of etcd. The workers and frontend must share a disk.
python -m dynamo.frontend --http-port 8000 [--tls-cert-path cert.pem] [--tls-key-path key.pem] [--store-kv file]

# Start the SGLang engine, connecting to NATS and etcd to receive requests. You can run several of these,
# both for the same model and for multiple models. The frontend node will discover them.
# Pass --store-kv to use the filesystem instead of etcd. The workers and frontend must share a disk.
python -m dynamo.sglang --model deepseek-ai/DeepSeek-R1-Distill-Llama-8B [--store-kv file]
```

#### Send a Request

```bash
curl localhost:8000/v1/chat/completions   -H "Content-Type: application/json"   -d '{
    "model": "deepseek-ai/DeepSeek-R1-Distill-Llama-8B",
    "messages": [
    {
        "role": "user",
        "content": "Hello, how are you?"
    }
    ],
    "stream":false,
    "max_tokens": 300
  }' | jq
```

Rerun with `curl -N` and change `stream` in the request to `true` to get the responses as soon as the engine issues them.

### Deploying Dynamo

- Follow the [Quickstart Guide](docs/kubernetes/README.md) to deploy on Kubernetes.
- Check out [Backends](examples/backends) to deploy various workflow configurations (e.g. SGLang with router, vLLM with disaggregated serving, etc.)
- Run some [Examples](examples) to learn about building components in Dynamo and exploring various integrations.

### Service Discovery and Messaging

Dynamo uses TCP for inter-component communication. External services are optional for most deployments:

| Deployment | etcd | NATS | Notes |
|------------|------|------|-------|
| **Kubernetes** | ❌ Not required | ❌ Not required | K8s-native discovery; TCP request plane |
| **Local development** | ❌ Not required | ❌ Not required | Pass `--store-kv file`; TCP request plane |
| **KV-aware routing** | — | ✅ Required | Add NATS for KV event messaging |

For local development, pass `--store-kv file` to both the frontend and workers. For distributed non-Kubernetes deployments or KV-aware routing:

- [etcd](https://etcd.io/) can be run directly as `./etcd`.
- [nats](https://nats.io/) needs JetStream enabled: `nats-server -js`.

To quickly setup both: `docker compose -f deploy/docker-compose.yml up -d`

### Benchmarking Dynamo

Dynamo provides comprehensive benchmarking tools to evaluate and optimize your deployments:

- **[Benchmarking Guide](docs/benchmarks/benchmarking.md)** – Compare deployment topologies (aggregated vs. disaggregated vs. vanilla vLLM) using AIPerf
- **[SLA-Driven Dynamo Deployments](docs/planner/sla_planner_quickstart.md)** – Optimize your deployment to meet SLA requirements

## Frontend OpenAPI specification

The OpenAI-compatible HTTP frontend exposes an OpenAPI 3 specification at `/openapi.json`.
To generate and persist the same specification without running the server (for example for CI, documentation, or NIM integration), run:

```bash
cargo run -p dynamo-llm --bin generate-frontend-openapi
```

This writes the current frontend spec to `docs/frontends/openapi.json` at the repository root.

# Engines

Dynamo is designed to be inference engine agnostic. To use any engine with Dynamo, start a Dynamo frontend (`python -m dynamo.frontend`). For local development, pass `--store-kv file` to avoid etcd dependency. NATS is optional and only required for KV-aware routing.

## vLLM

```
uv pip install ai-dynamo[vllm]
```

Run the backend/worker like this:

```
python -m dynamo.vllm --help
```

vLLM attempts to allocate enough KV cache for the full context length at startup. If that does not fit in your available memory pass `--context-length <value>`.

To specify which GPUs to use set environment variable `CUDA_VISIBLE_DEVICES`.

## SGLang

```
# Install libnuma
apt install -y libnuma-dev

uv pip install ai-dynamo[sglang]
```

Run the backend/worker like this:

```
python -m dynamo.sglang --help
```

You can pass any sglang flags directly to this worker, see https://docs.sglang.ai/advanced_features/server_arguments.html . See there to use multiple GPUs.

## TensorRT-LLM

It is recommended to use [NGC PyTorch Container](https://catalog.ngc.nvidia.com/orgs/nvidia/containers/pytorch) for running the TensorRT-LLM engine.

> [!Note]
> Ensure that you select a PyTorch container image version that matches the version of TensorRT-LLM you are using.
> For example, if you are using `tensorrt-llm==1.2.0rc5`, use the PyTorch container image version `25.10`.
> To find the correct PyTorch container version for your desired `tensorrt-llm` release, visit the [TensorRT-LLM Dockerfile.multi](https://github.com/NVIDIA/TensorRT-LLM/blob/main/docker/Dockerfile.multi) on GitHub. Switch to the branch that matches your `tensorrt-llm` version, and look for the `BASE_TAG` line to identify the recommended PyTorch container tag.

> [!Important]
> Launch container with the following additional settings `--shm-size=1g --ulimit memlock=-1`

### Install prerequisites

```
# Optional step: Only required for non-container installations. The PyTorch 25.10 container already includes PyTorch 2.9.0 with CUDA 13.0.
uv pip install torch==2.9.0 torchvision --index-url https://download.pytorch.org/whl/cu130

sudo apt-get -y install libopenmpi-dev

# Optional step: Only required for disaggregated serving
sudo apt-get -y install libzmq3-dev
```

> [!Tip]
> You can learn more about these prequisites and known issues with TensorRT-LLM pip based installation [here](https://nvidia.github.io/TensorRT-LLM/installation/linux.html).

### After installing the pre-requisites above, install Dynamo

```
pip install --pre --extra-index-url https://pypi.nvidia.com ai-dynamo[trtllm]
```

> [!Note]
> We use `pip` instead of `uv` here because `tensorrt-llm` has a URL-based git dependency (`etcd3`) that `uv` does not currently support.

Run the backend/worker like this:

```
python -m dynamo.trtllm --help
```

To specify which GPUs to use set environment variable `CUDA_VISIBLE_DEVICES`.

# Developing Locally

## 1. Install libraries

**Ubuntu:**

```
sudo apt install -y build-essential libhwloc-dev libudev-dev pkg-config libclang-dev protobuf-compiler python3-dev cmake
```

**macOS:**

- [Homebrew](https://brew.sh/)

```
# if brew is not installed on your system, install it
/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
```

- [Xcode](https://developer.apple.com/xcode/)

```
brew install cmake protobuf

## Check that Metal is accessible
xcrun -sdk macosx metal
```

If Metal is accessible, you should see an error like `metal: error: no input files`, which confirms it is installed correctly.

## 2. Install Rust

```
curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
source $HOME/.cargo/env
```

## 3. Create a Python virtual env:

Follow the instructions in [uv installation](https://docs.astral.sh/uv/#installation) guide to install uv if you don't have `uv` installed. Once uv is installed, create a virtual environment and activate it.

- Install uv

```bash
curl -LsSf https://astral.sh/uv/install.sh | sh
```

- Create a virtual environment

```bash
uv venv dynamo
source dynamo/bin/activate
```

## 4. Install build tools

```
uv pip install pip maturin
```

[Maturin](https://github.com/PyO3/maturin) is the Rust<->Python bindings build tool.

## 5. Build the Rust bindings

```
cd lib/bindings/python
maturin develop --uv
```

## 6. Install the wheel

```
cd $PROJECT_ROOT
uv pip install -e .
```

You should now be able to run `python -m dynamo.frontend`.

For local development, pass `--store-kv file` to avoid external dependencies (see Service Discovery and Messaging section).

Set the environment variable `DYN_LOG` to adjust the logging level; for example, `export DYN_LOG=debug`. It has the same syntax as `RUST_LOG`.

If you use vscode or cursor, we have a .devcontainer folder built on [Microsofts Extension](https://code.visualstudio.com/docs/devcontainers/containers). For instructions see the [ReadMe](.devcontainer/README.md) for more details.

# Contributing

We welcome contributions! Whether it's bug reports, documentation improvements, or code contributions—every bit helps.

- **[Contributing Guide](CONTRIBUTING.md)** – How to get started
- **[Report a Bug](https://github.com/ai-dynamo/dynamo/issues/new?template=bug_report.yml)** – Found an issue?
- **[Feature Request](https://github.com/ai-dynamo/dynamo/issues/new?template=feature_request.yml)** – Have an idea?

# Community

Dynamo thrives on community contributions.

![External Contributors](https://img.shields.io/badge/community_contributors-70%2B-brightgreen)
![Community PRs](https://img.shields.io/badge/PRs_merged-130%2B-blue)

See our [contributor graph](https://github.com/ai-dynamo/dynamo/graphs/contributors) for the full picture.

<!-- Reference links for Feature Compatibility Matrix -->
[disagg]: docs/design_docs/disagg_serving.md
[kv-routing]: docs/router/kv_cache_routing.md
[planner]: docs/planner/sla_planner.md
[kvbm]: docs/kvbm/kvbm_architecture.md
[mm]: examples/multimodal/
[migration]: docs/fault_tolerance/request_migration.md
[lora]: examples/backends/vllm/deploy/lora/README.md
[tools]: docs/agents/tool-calling.md