Couchbase Server, originally known as Membase, is an open-source, distributed multi-model NoSQL document-oriented database software package optimized for interactive applications.
These applications may serve many concurrent users by creating, storing, retrieving, aggregating, manipulating and presenting data.
In support of these kinds of application needs, Couchbase Server is designed to provide easy-to-scale key-value or JSON document access with low latency and high sustained throughput.
It is designed to be clustered from a single machine to very large-scale deployments spanning many machines.
Every Couchbase node consists of a data service, index service, query service, and cluster manager component.
Starting with the 4.0 release, the three services can be distributed to run on separate nodes of the cluster if needed.
Couchbase Mobile, which stores data locally on devices (usually mobile devices) is used to create “offline-first” applications that can operate when a device is not connected to a network and synchronize with Couchbase Server once a network connection is re-established.
A query language called the non-first normal form query language, N1QL, is used for manipulating the JSON data in Couchbase, just like SQL manipulates data in RDBMS.
Official website :- https://www.couchbase.com/products/server
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