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Big Data Glossary

What is NoSQL?

Definition of NoSQL

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What is NoSQL?

NoSQL (Not only SQL) is a type of database management system that is used to store and retrieve large amounts of unstructured and semi-structured data. It is designed to handle the scale and complexity of modern big data and is often used for real-time web, mobile, and gaming applications. Unlike traditional relational databases, which use SQL and a fixed schema, NoSQL databases use a variety of data models, such as key-value, document, columnar, and graph, and have a more flexible schema.

Some of the key features of NoSQL databases include:

  • High scalability: NoSQL databases can scale horizontally, by adding more machines to a cluster, to handle large amounts of data and high traffic.
    High performance: NoSQL databases are designed to provide low latency and high throughput, making them well-suited for real-time and high-performance applications.
  • Flexible data model: NoSQL databases use a variety of data models that can be easily adapted to changing data and query patterns.
  • Distributed architecture: NoSQL databases are designed to work in a distributed environment, allowing data to be spread across multiple machines for better performance and availability.
  • Schema-less: NoSQL databases are schema-less, meaning that the structure of the data can change over time, without the need for a predefined schema.

Some popular NoSQL databases include MongoDB, Cassandra, and Redis. NoSQL databases are well suited for big data and real-time web, mobile, and gaming applications but it can be less suitable for applications that require complex transactions and rigorous data consistency.

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