CouchDB（couchdb.apache.org） | Web Scraping Tool | ScrapeStorm
Abstract：CouchDB (Apache CouchDB) is an open source NoSQL database classified as a document-oriented database ScrapeStormFree Download
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Introduction
CouchDB (Apache CouchDB) is an open source NoSQL database classified as a document-oriented database. CouchDB is designed to store data in JSON format and access data via HTTP protocol, and is often used in distributed databases and offline-first applications. It also functions as a multi-version data store and query processing using MapReduce, and is designed to improve data consistency and reliability.
Applicable Scene
CouchDB is well suited for the “offline first” approach, as it is designed with the assumption that your applications will be operated offline. CouchDB stores data locally and automatically syncs it when you are back online. For example, this is useful for mobile and web applications where you want to continue working offline and sync it back to the server later.
Pros: CouchDB provides an offline-first feature where data is stored locally and later synchronized even when the server is temporarily inaccessible. This allows you to work with data even when offline. CouchDB is characterized by its extremely simple replication between databases. It is easy to synchronize data between local devices and cloud servers, or between multiple servers. Since data is stored in JSON format, data structures are highly flexible and a schemaless design is possible. This means that there is no need to determine the data schema in advance, making it easier to respond to the growth and changes of applications.
Cons: Although schemaless databases are flexible, they may not be suitable for systems that require complex queries and joins like relational databases. In particular, their performance may be inferior to other databases when performing complex aggregations and filtering. Query processing requires MapReduce, and some users find it more difficult to build queries than other NoSQL databases. MapReduce has a high learning cost, so even simple queries may take time. While CouchDB has excellent scalability and replication, it has limited write performance. Other options may be preferable for systems that require large amounts of writing or real-time data processing.
Legend
1. CouchDB homepage.
2. CouchDB editing page.
