NOTICE: The master branch has recently converted to using CMake to build the server, clients and other artifacts. Read the new documentation carefully to understand the new build process.

LATEST RELEASE: You are currently on the master branch which tracks under-development progress towards the next release. The latest release of the TensorRT Inference Server is 1.2.0 and is available on branch r19.05.

The NVIDIA TensorRT Inference Server provides a cloud inferencing solution optimized for NVIDIA GPUs. The server provides an inference service via an HTTP or gRPC endpoint, allowing remote clients to request inferencing for any model being managed by the server. The inference server provides the following features:

• Multiple framework support. The server can manage any number and mix of models (limited by system disk and memory resources). Supports TensorRT, TensorFlow GraphDef, TensorFlow SavedModel and Caffe2 NetDef model formats. Also supports TensorFlow-TensorRT integrated models. Variable-size input and output tensors are allowed if supported by the framework. See Capabilities for detailed support information for each framework.
• Concurrent model execution support. Multiple models (or multiple instances of the same model) can run simultaneously on the same GPU.
• Batching support. For models that support batching, the server can accept requests for a batch of inputs and respond with the corresponding batch of outputs. The inference server also supports multiple scheduling and batching algorithms that combine individual inference requests together to improve inference throughput. These scheduling and batching decisions are transparent to the client requesting inference.
• Custom backend support. The inference server allows individual models to be implemented with custom backends instead of by a deep-learning framework. With a custom backend a model can implement any logic desired, while still benefiting from the GPU support, concurrent execution, dynamic batching and other features provided by the server.
• Ensemble support. An ensemble represents a pipeline of one or more models and the connection of input and output tensors between those models. A single inference request to an ensemble will trigger the execution of the entire pipeline.
• Multi-GPU support. The server can distribute inferencing across all system GPUs.
• The inference server monitors the model repository for any change and dynamically reloads the model(s) when necessary, without requiring a server restart. Models and model versions can be added and removed, and model configurations can be modified while the server is running.
• Model repositories may reside on a locally accessible file system (e.g. NFS) or in Google Cloud Storage.
• Readiness and liveness health endpoints suitable for any orchestration or deployment framework, such as Kubernetes.
• Metrics indicating GPU utilization, server throughput, and server latency.

The current release of the TensorRT Inference Server is 1.2.0 and corresponds to the 19.05 release of the tensorrtserver container on NVIDIA GPU Cloud (NGC). The branch for this release is r19.05.

Continuing in version 1.2.0 the following interfaces maintain backwards compatibilty with the 1.0.0 release. If you have model configuration files, custom backends, or clients that use the inference server HTTP or GRPC APIs (either directly or through the client libraries) from releases prior to 1.0.0 (19.03) you should edit and rebuild those as necessary to match the version 1.0.0 APIs.

These inferfaces will maintain backwards compatibility for all future 1.x.y releases (see below for exceptions):

• Model configuration as defined in model_config.proto.
• The inference server HTTP and GRPC APIs as defined in api.proto and grpc_service.proto.
• The custom backend interface as defined in custom.h.

As new features are introduced they may temporarily have beta status where they are subject to change in non-backwards-compatible ways. When they exit beta they will conform to the backwards-compatibility guarantees described above. Currently the following features are in beta:

• In the model configuration defined in model_config.proto the sections related to model ensembling are currently in beta. In particular, the ModelEnsembling message will potentially undergo non-backwards-compatible changes.

The User Guide, Developer Guide, and API Reference documentation provide guidance on installing, building and running the latest release of the TensorRT Inference Server.

You can also view the documentation for the master branch and for earlier releases.

READMEs for deployment examples can be found in subdirectories of deploy/, for example, deploy/single_server/README.rst.

The Release Notes and Support Matrix indicate the required versions of the NVIDIA Driver and CUDA, and also describe which GPUs are supported by the inference server.

• Maximizing Utilization for Data Center Inference with TensorRT Inference Server.
• NVIDIA TensorRT Inference Server Boosts Deep Learning Inference.
• GPU-Accelerated Inference for Kubernetes with the NVIDIA TensorRT Inference Server and Kubeflow.

Contributions to TensorRT Inference Server are more than welcome. To contribute make a pull request and follow the guidelines outlined in the Contributing document.

We appreciate any feedback, questions or bug reporting regarding this project. When help with code is needed, follow the process outlined in the Stack Overflow (https://stackoverflow.com/help/mcve) document. Ensure posted examples are:

• minimal – use as little code as possible that still produces the same problem
• complete – provide all parts needed to reproduce the problem. Check if you can strip external dependency and still show the problem. The less time we spend on reproducing problems the more time we have to fix it
• verifiable – test the code you're about to provide to make sure it reproduces the problem. Remove all other problems that are not related to your request/question.