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Mycat-Server is a MySQL database middleware system that functions as a sharding proxy, distributed database coordinator, and high availability manager. It acts as a proxy layer that routes SQL traffic between applications and multiple backend MySQL database instances to enable horizontal scaling. The system coordinates distributed transactions, generates global unique sequences to prevent primary key collisions, and executes distributed join queries across multiple database shards. It includes a load balancer that performs read-write splitting by directing traffic between primary and slave no

LanceDB is a vector database and columnar data store designed to function as a versioned dataset manager and vector search engine. It serves as a high-performance backend for indexing and retrieving high-dimensional embeddings, providing the foundation for machine learning data pipelines. The system distinguishes itself through a combination of cloud-native object storage and immutable version tracking, allowing for data time-travel and reproducible AI experiments. It integrates hybrid search capabilities, merging dense vector similarity with BM25 full-text search and SQL-like scalar filters

Vendure is a Node.js e-commerce engine and headless commerce framework built with NestJS and TypeScript. It serves as a multi-channel commerce platform that manages product catalogs, orders, and customers via a strongly typed GraphQL API. The platform is distinguished by its highly extensible architecture, featuring a customizable administrative dashboard where developers can inject custom React components and entity views. It supports multi-channel commerce, allowing the isolation of products, currencies, and regional catalogs from a single unified backend. The engine covers a broad range o

graphql-go is a server library for implementing GraphQL servers in Go. It provides the core infrastructure for schema parsing, resolver mapping, and query execution. The library includes a subscription engine that enables real-time data streaming to clients using WebSocket transport. It also features an execution tracer for monitoring and profiling query performance through telemetry tools. The system manages resource consumption and stability through a query optimizer that enforces depth restrictions and controls resolver concurrency. It supports data fetching optimization via field-level p

OSV is a distributed database and aggregator of open-source security advisories that uses a standardized vulnerability schema to track security flaws. It functions as a system for collecting and normalizing security data from diverse ecosystems into a single unified format, providing a web API for querying package vulnerabilities and submitting standardized records. The project distinguishes itself through a security advisory distribution service that supports bulk dataset exports via cloud storage buckets and incremental synchronization of security record updates. It also employs sandbox-bas