Website: grpc.io
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gRPC is a high-performance, open-source universal Remote Procedure Call (RPC) framework developed by Google. It is designed to efficiently connect services in and across data centers, with support for load balancing, tracing, health checking, and authentication. gRPC is also applicable in the last mile of distributed computing to connect devices, mobile applications, and browsers to backend services. Key Features: 1. Simple Service Definition: Services are defined using Protocol Buffers, a powerful binary serialization toolset and language. 2. Quick Start and Scalability: Installation of runtime and development environments is streamlined, and the framework can scale to handle millions of RPCs per second. 3. Cross-Language and Platform Support: gRPC can automatically generate idiomatic client and server stubs for services in various languages and platforms. 4. Bi-Directional Streaming and Integrated Authentication: Supports bi-directional streaming and fully integrated pluggable authentication with HTTP/2-based transport. Usage Scenarios: gRPC is commonly used for efficiently connecting polyglot services in microservices-style architecture and for connecting mobile devices and browser clients to backend services. It is known for generating efficient client libraries and is used by many companies for various use cases. Companies Using gRPC: Several companies, including Square, have adopted gRPC for connecting multiple services in their environments. Square, for example, collaborated with Google to replace its custom RPC solution with gRPC due to its open support for multiple platforms, demonstrated performance, and customization capabilities. Other companies have also reported successful adoption of gRPC, citing benefits such as seamless migration from existing solutions, improved performance in handling large RPCs, and support for high-performance bi-directional streaming and TLS-based security. Origin and Development: gRPC was initially created by Google, which had been using a general-purpose RPC infrastructure called Stubby to connect microservices within and across its data centers for over a decade. In 2015, Google decided to build the next version of Stubby and open-source it, leading to the development of gRPC. The framework has since gained popularity and is used by many organizations outside of Google for a wide range of use cases, from microservices to the "last mile" of computing, including mobile, web, and Internet of Things (IoT) applications. In summary, gRPC is a widely adopted, high-performance RPC framework with a strong focus on efficiency, cross-language and platform support, and seamless integration with various services and devices. Its open-source nature, support for multiple use cases, and the backing of Google make it a reliable choice for modern distributed systems and applications."