description CouchDB Overview
CouchDB is a modern, distributed NoSQL database designed for storing data as JSON documents. Its notable feature is asynchronous replication which ensures high availability across multiple servers. This architecture makes CouchDB suitable for applications requiring scalability and flexible schemas, particularly those developed using JavaScript or needing a cloud-native solution. It’s commonly used by developers building web applications and services where dynamic data structures are important.
help CouchDB FAQ
Is CouchDB a relational database?
No, Apache CouchDB is a document database that stores records as JSON documents instead of rows in linked SQL tables. It exposes those documents through a REST-style HTTP API.
How does CouchDB replication work?
CouchDB compares document revisions between a source and a target and copies the missing changes through its replication protocol. The design supports multi-server syncing and offline-first applications.
What happens when two CouchDB copies edit the same document?
CouchDB uses revision tracking and MVCC to detect conflicting document updates rather than silently overwriting one side. The application or administrator must then choose or merge the winning content.
What is the CouchDB changes feed used for?
The _changes feed lets an application watch for database changes and react to new or updated documents. It is useful for sync workers, search indexing, and live update workflows built around JSON documents.
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