Definition - What does CouchDB mean?
Apache CouchDB is a non-relational or NoSQL database which was developed to fully embrace the web. Data is stored within JSON documents which can be accessed and its indices queried via HTTP.
Techopedia explains CouchDB
CouchDB is an open source document-oriented database which uses key-value maps for storing document fields.
The fields can be simple key-value pairs, maps, or lists. Each document stored is given a document-level unique identifier and a revision number whenever there are changes made to it. CouchDB is able to do on-the-fly document transformation as well as present real-time change notifications, making web applications development easier.
It specializes in Availability and Partition Tolerance (AP) but can eventually be consistent through minor work. As a comparison, MongoDB is mostly Consistency and Partition Tolerant.
Quick indexing and retrieval
Easy replication across multiple server instances
Multiple libraries for different languages
JSON-based document format
REST-like interface for document retrieval, deletion, updates and insertion
Data feed updates which are subscribable through the changes feed
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