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Caching Key Concepts

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What is Caching?

Caching is a technique for storing frequently used data in a fast-access memory, which can improve the performance of a system. The cached data can be retrieved quickly and easily, reducing the time and resources needed to fetch the data from its original source (such as a database or a file system).

 Why to use Caching?

 Caching is used to reduce the number of requests to the original data source, which can result in improved performance, reduced latency, and increased throughput. Caching can also help to reduce the load on the original data source, leading to improved scalability and lower operational costs.

 Types of Caching 

There are several different types of caching available, including: 

In-memory caching: In-memory caching stores frequently used data in a fast-access memory, such as RAM, for quick retrieval. This can improve the speed and performance of the application by reducing the number of requests to the original data source. 

Database caching: Database caching stores frequently accessed data in the memory of the database server to reduce the number of queries to the underlying storage engine. This can improve the speed and performance of the database, particularly for read-heavy workloads.

 Content Delivery Network (CDN) caching: CDN caching stores frequently accessed static content, such as images and videos, in multiple edge locations distributed around the world. This can improve the speed and performance of content delivery, particularly for global audiences. 

Application caching: Application caching stores frequently accessed data within the application itself, reducing the number of requests to external data sources. This can improve the performance of the application, particularly for read-heavy workloads. 

Browser caching: Browser caching stores frequently accessed static content, such as images and JavaScript files, in the user's browser. This can improve the speed and performance of the user experience by reducing the number of requests to the server. 

By using caching, a system can reduce the number of requests to the original data source and improve the performance and scalability of the application. However, caching requires careful planning and management to ensure that the cached data remains consistent and up-to-date.

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