Awesome GitHub RepositoriesDistributed Consensus Stores

etcd is a distributed key-value store and configuration store designed to maintain a consistent set of data across a cluster of nodes. It functions as a reliable registry for storing and synchronizing critical settings and metadata used by distributed applications. The system implements the Raft consensus algorithm to ensure data consistency and leader election across servers. To protect data transfers and verify node identities, it utilizes a network security layer based on mutual TLS and client certificates. Its capabilities cover distributed configuration management, cluster state synchro

TiDB is a horizontally scalable, distributed SQL database designed to provide consistent transactional storage and high-performance analytical processing within a single unified architecture. It utilizes a decoupled compute-storage design and a distributed key-value storage layer to ensure horizontal scalability and efficient range-based queries. By employing a consensus-based replication algorithm, the system maintains high availability and automatic failover across multiple nodes and geographical regions. The platform distinguishes itself through its hybrid transactional and analytical proc

Vitess is a database clustering system for horizontal scaling of MySQL. It functions as a middleware layer that abstracts complex sharding and physical topology, allowing applications to interact with a distributed database environment through a unified interface. By intercepting and routing SQL queries across multiple shards, it enables large-scale data management while maintaining the appearance of a single database instance. The platform distinguishes itself through its ability to perform online schema migrations and distributed transaction coordination without requiring application downti

rqlite is a distributed relational database that replicates SQLite data across a cluster using the Raft consensus algorithm. It functions as a fault-tolerant storage system that provides high availability and a web API for executing SQL queries and managing relational data without requiring native database drivers. The system distinguishes itself by using an HTTP SQL interface to expose database operations and cluster management. It features a real-time change data capture stream that pushes database mutations to external HTTP endpoints via webhooks and supports the scaling of read throughput

TiKV is a cloud-native distributed transactional key-value store and storage engine. It provides a distributed database designed for horizontal scalability and strong consistency across a cluster of physical nodes. The system uses a Raft-based consensus mechanism to maintain data availability and state synchronization. It ensures ACID compliance for distributed transactions through a two-phase commit workflow and manages data distribution via multi-Raft sharding. The engine handles massive datasets using automated range splitting and cluster load balancing to distribute data across different

ZooKeeper is a distributed coordination service that provides a centralized system for managing configuration, naming, and synchronization across a cluster of distributed processes. It functions as a cluster consensus service, a distributed configuration store, and a distributed lock manager to maintain a consistent state across multiple network nodes. The service implements a consensus protocol to ensure data consistency and uses a replicated state machine to maintain identical copies of the system state across all servers. It provides a distributed lock management system to coordinate exclu

Nebula is a distributed graph database designed for storing and querying massive volumes of interconnected vertices and edges across a horizontally scalable cluster. It functions as a Kubernetes-native database and a distributed graph analytics engine, utilizing a Raft-based distributed store to ensure strong consistency and high availability. The system features an OpenCypher query engine for performing complex graph traversals and pattern matching. It distinguishes itself with a decoupled compute-storage architecture and a shared-nothing distributed design, allowing query processing and dat

OceanBase is a distributed SQL database designed for high availability and strong consistency across multiple nodes and regions. It functions as a hybrid transactional and analytical processing engine, allowing real-time analytics and transactions to execute on a single data copy. The system also serves as a vector database engine for indexing and querying vector data to power semantic search and recommendation systems. The platform features native compatibility layers for MySQL and Oracle, enabling the migration of legacy workloads without rewriting SQL code. It utilizes a Paxos-based distri

Cassandra is a distributed NoSQL database and wide-column store designed for high availability and linear scalability. It functions as a fault-tolerant distributed system that utilizes an LSM-tree storage engine to optimize write throughput and manage massive datasets. The system is a CQL-compliant database, using a structured query language to manage and retrieve tabular data stored across multiple nodes. It organizes information into rows and columns based on a flexible schema and primary keys. The project provides capabilities for horizontal database scaling, distributed data partitioning

Patroni is a high availability manager and cluster orchestrator for PostgreSQL. It functions as an automatic failover controller and replication manager that ensures continuous database availability by automating leader election and promoting standby nodes during failures. The system maintains a consistent cluster state by acting as a distributed consensus coordinator. It synchronizes configuration and manages leader elections through integration with distributed configuration stores such as etcd, ZooKeeper, or Consul. Its broader capabilities include managing both synchronous and asynchrono

Hazelcast is a distributed data platform that combines an in-memory data grid with a stream processing engine to support real-time analytics and event-driven applications. It functions as a partitioned, distributed key-value store that replicates data across cluster nodes to provide low-latency access and high availability. The platform also serves as a distributed SQL query engine, allowing users to execute standard SQL statements against both in-memory datasets and external data sources. What distinguishes Hazelcast is its use of a distributed consensus subsystem to maintain strongly consis

Pigsty هي منصة تنسيق بنية تحتية لقاعدة بيانات شاملة مصممة لأتمتة دورة الحياة الكاملة لمجموعات PostgreSQL عالية التوافر. تعمل كإطار عمل للبنية التحتية ككود يدير تنسيق المجموعة، وتوفير العقد، واكتشاف الخدمة من خلال دفاتر تشغيل متطابقة. من خلال دمج آليات الإجماع الموزعة، تضمن المنصة تجاوز الفشل الآلي وإنفاذ الحالة المتسقة عبر بيئات متنوعة، بما في ذلك الأجهزة المعدنية والبنية التحتية الافتراضية. تتميز المنصة بمجموعة قوية من القدرات التشغيلية التي تمتد إلى ما وراء إدارة قاعدة البيانات القياسية. تتميز بخط أنابيب مراقبة مدمج يجمع المقاييس والسجلات والآثار في لوحات تحكم مركزية لمراقبة الأداء في الوقت الفعلي والتحليل التشخيصي. بالإضافة إلى ذلك، توفر إطار عمل ترحيل يحاكي بروتوكولات الأسلاك المملوكة وصيغة SQL، مما يسمح بدمج أعباء عمل قاعدة بيانات المؤسسات القديمة في بيئات علائقية حديثة. يغطي النظام مساحة وظيفية واسعة، بما في ذلك إدارة التخزين المتقدمة مع استنساخ النسخ عند الكتابة للنشر السريع، وتنسيق قواعد البيانات المتعددة الذي ينسق المحركات العلائقية مع التخزين المؤقت وتخزين الكائنات. كما يدمج تقوية الأمان، والنسخ الاحتياطي والاستعادة الآلي، وتوجيه حركة المرور من خلال وكلاء طبقيين لفصل اتصالات العميل عن طوبولوجيا المجموعة الأساسية. يتم توزيع المشروع كنموذج مرآة حزمة مكتفٍ ذاتياً، مما يتيح النشر المتسق وإدارة التبعية في البيئات الآمنة أو المعزولة.

Jocko عبارة عن منصة بث أحداث سحابية أصلية وسجل التزامات (Commit log) موزع تم تنفيذه بلغة Go. يعمل كوسيط رسائل موزع يضمن متانة البيانات وتوافرها العالي من خلال تكرار تسلسلات السجلات عبر مجموعة (Cluster). تم تصميم النظام كبث أحداث بدون Zookeeper، مستخدمًا تنسيق إجماع مدمج لإدارة حالة المجموعة وانتخاب القائد دون الحاجة إلى خدمات تنسيق خارجية. ينفذ بروتوكول Kafka، مما يسمح له بالتواصل مع عملاء وأدوات النظام البيئي الحالي. توفر المنصة قدرات لإدارة السجلات الموزعة، بما في ذلك استخدام سجل التزامات للإلحاق فقط (Append-only) لضمان استمرارية البيانات. كما تتضمن آليات تلقائية للاحتفاظ بالبيانات تقوم بمسح السجلات القديمة بناءً على حدود زمنية أو عتبات مساحة القرص. يتم توزيع المشروع كملف تشغيل ثنائي واحد.