NVIDIA Triton Inference Server

NVIDIA Triton Inference Server provides a cloud inferencing solution optimized for NVIDIA GPUs. The server provides an inference service via an HTTP/REST or GRPC endpoint, allowing remote clients to request inferencing for any model being managed by the server. For edge deployments, Triton Server is also available as a shared library with an API that allows the full functionality of the server to be included directly in an application.

What’s New in 2.2.0

• TensorFlow 2.x is now supported in addition to TensorFlow 1.x. See the Frameworks Support Matrix for the supported TensorFlow versions. The version of TensorFlow used can be selected when launching Triton with the –backend-config=tensorflow,version=<version> flag. Set <version> to 1 or 2 to select TensorFlow1 or TensorFlow2 respectively. By default TensorFlow 1 is used.

• Add inference request timeout option to Python and C++ client libraries.

• GRPC inference protocol updated to fix performance regression.

• Explicit major/minor versioning added to TRITONSERVER and TRITONBACKED APIs.

• New CMake option TRITON_CLIENT_SKIP_EXAMPLES to disable building the client examples.

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, ONNX, PyTorch, and Caffe2 NetDef model formats. Both TensorFlow 1.x and TensorFlow 2.x are supported. Also supports TensorFlow-TensorRT and ONNX-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, Triton Server can accept requests for a batch of inputs and respond with the corresponding batch of outputs. Triton 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. Triton 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. Triton Server can distribute inferencing across all system GPUs.

• Triton Server provides multiple modes for model management. These model management modes allow for both implicit and explicit loading and unloading of models without requiring a server restart.

• Model repositories may reside on a locally accessible file system (e.g. NFS), in Google Cloud Storage or in Amazon S3.

• HTTP/REST and GRPC inference protocols based on the community developed KFServing protocol.

• Readiness and liveness health endpoints suitable for any orchestration or deployment framework, such as Kubernetes.

• Metrics indicating GPU utilization, server throughput, and server latency.

• C library inferface allows the full functionality of Triton Server to be included directly in an application.

User Guide

• Quickstart
  • Prerequisites
  • Using A Prebuilt Docker Container
  • Building With Docker
  • Building With CMake
  • Run Triton Inference Server
  • Verify Triton Is Running Correctly
  • Getting The Client Examples
  • Running The Image Classification Example
• Installing Triton
• Running Triton
  • Example Model Repository
  • Running Triton On A System With A GPU
  • Running Triton On A System Without A GPU
  • Running Triton Without Docker
  • Checking Triton Status
• Client Examples
  • Getting the Client Examples
  • Simple Example Applications
  • Image Classification Example Application
  • Ensemble Image Classification Example Application
• Client Libraries
  • Getting the Client Libraries
  • Building Your Own Client
  • Client Library API
• Model Repository
  • Model Repository Locations
  • Repository Layout
  • Modifying the Model Repository
  • Model Versions
  • Framework Model Definition
• Model Configuration
  • Minimal Model Configuration
  • Generated Model Configuration
  • Datatypes
  • Reshape
  • Shape Tensors
  • Version Policy
  • Instance Groups
  • Scheduling And Batching
  • Optimization Policy
  • Model Warmup
• Models And Schedulers
  • Stateless Models
  • Stateful Models
  • Ensemble Models
• Model Management
  • Model Control Mode NONE
  • Model Control Mode EXPLICIT
  • Model Control Mode POLL
• Optimization
  • Optimization Settings
  • perf_client
  • Server Trace
• Metrics

Developer Guide

• Architecture
  • Concurrent Model Execution
• Backends
  • Backend Shared Library
  • Triton Backend API
  • Example Backends
  • Legacy Custom Backends
• Custom Operations
  • TensorRT
  • TensorFlow
  • PyTorch
  • ONNX
• HTTP/REST and GRPC API
• Library API
• Building
  • Building Triton
  • Building A Custom Backend
  • Building the Client Libraries and Examples
  • Building the Documentation
• Testing
  • Generate QA Model Repositories
  • Build QA Container
  • Run QA Container
• Contributing
  • Coding Convention

Reference

• FAQ
  • What are the advantages of running a model with Triton Inference Server compared to running directly using the model’s framework API?
  • Can Triton Inference Server run on systems that don’t have GPUs?
  • Can Triton Inference Server be used in non-Docker environments?
  • Do you provide client libraries for languages other than C++ and Python?
  • How would you use Triton Inference Server within the AWS environment?
  • How do I measure the performance of my model running in the Triton Inference Server?
  • How can I fully utilize the GPU with Triton Inference Server?
  • If I have a server with multiple GPUs should I use one Triton Inference Server to manage all GPUs or should I use multiple inference servers, one for each GPU?
• Capabilities
• Protobuf API
  • GRPC API
  • Model Configuration
• C++ API
  • Class Hierarchy
  • File Hierarchy
  • Full API
• Python API
  • GRPC Client
  • HTTP/REST Client
  • Client Utilities
  • Shared Memory Utilities

Indices and tables

• Index