apache/couchdb
Couchdb
CouchDB ist eine NoSQL-Dokumentendatenbank, die Daten als flexible Dokumente speichert und eine RESTful-API für das Datenmanagement über HTTP bereitstellt. Sie fungiert als verteilter Dokumentenspeicher, der Daten über mehrere Knoten hinweg synchronisiert und repliziert, um hohe Verfügbarkeit und Konsistenz zu gewährleisten.
Das System enthält eine Volltext-Suchmaschine, die Datenbankeinträge in abfragbare Dokumente transformiert und Sortierung sowie Paginierung unterstützt. Die Datensynchronisierung erfolgt über Multi-Master-Replikation, die Revisionshistorien austauscht, um die Konsistenz über verteilte Knoten hinweg zu wahren.
Die Datenbank nutzt Multi-Version-Concurrency-Control, um gleichzeitige Lese- und Schreibvorgänge ohne Sperren zu ermöglichen. Die Speicherung erfolgt über Append-Only- und B-Tree-basierte Strukturen, um die Wiederherstellung nach Abstürzen und effiziente diskbasierte Suchvorgänge zu erleichtern.
Features
- Document Storage - Persists unstructured or semi-structured data as flexible documents in a NoSQL store.
- Distributed Document Stores - Implements a schema-flexible storage architecture that organizes data into searchable documents across distributed environments.
- Data Replication - Synchronizes data across distributed database nodes to ensure consistency and high availability across the network.
- Document Databases - Operates as a database that stores data in flexible, document-oriented formats like JSON.
- Inter-Node Data Synchronization - Synchronizes data across multiple primary nodes to maintain reliability and availability within the distributed cluster.
- Multi-Master Replication - Implements a replication architecture where multiple nodes can concurrently serve both read and write requests.
- RESTful HTTP Interfaces - Exposes all database operations through a stateless REST-oriented HTTP interface for remote data management.
- RESTful Data APIs - Implements programmatic interfaces using standard HTTP methods for creating and managing document data.
- Append-Only Storage Engines - Utilizes a storage architecture that persists data as immutable sequences of records to improve crash recovery.
- Full-Text Search Engines - Ships a full-text search engine that transforms database records into queryable documents with sorting and pagination.
- Full-Text Search Indexes - Creates searchable indexes of text content allowing for rapid keyword retrieval across a large corpus of documents.
- Multi-Version Concurrency Control - Uses multi-version concurrency control to track document revisions and enable non-blocking read and write operations.
- Multi-Modal Index Queries - Retrieves documents using query syntax that supports sorting, range facets, and efficient pagination.
- B-Tree - Organizes documents and indexes in B-Tree structures to optimize disk-based range queries and lookups.
- Database Management APIs - Provides HTTP APIs specifically designed for managing database server configurations and operational settings.
- Database Engines - JSON-based document database with HTTP API.
- Database Management Systems - Document-oriented database with multi-master replication and HTTP API.
- Database Systems - Document-oriented database management system.
