Caching in SharePoint refers to the mechanisms and strategies used to store and retrieve frequently accessed data to improve performance and reduce latency. SharePoint employs various caching techniques to enhance user experience and optimize resource utilization.

Types of Caching

Object Cache

The Object Cache stores frequently requested objects, such as lists, libraries, and web parts, in memory. This helps reduce the need for repeated data retrieval from the database.

Output Cache

The Output Cache stores the rendered HTML of SharePoint pages or web parts, allowing for faster retrieval when the same content is requested again. It can be configured at different scopes, such as site, page, or web part.

Distributed Cache

Distributed Cache is a service that provides a scalable and efficient way to cache data across multiple SharePoint servers. It is used to store session state, lists, and other data across a SharePoint farm.

BLOB Cache

The Binary Large Object (BLOB) Cache is utilized to cache large files such as images, videos, and documents. It reduces the load on the SharePoint server by serving static content directly from the cache.

Benefits of Caching

• Improve Performance: Reduces the time taken to retrieve data, resulting in faster page load times.

• Decrease Load on Database: Minimizes the number of calls to the database, reducing server load.

• Enhanced User Experience: Faster access to frequently used content leads to a more responsive application.

Configuration

Caching can be configured through various settings in SharePoint Administration, including:

• Configuring Output Cache settings in the web.config file.

• Managing Object Cache and Distributed Cache through Central Administration and PowerShell commands.

• Setting up BLOB Cache settings to optimize the delivery of static assets.

Effective caching is crucial for the optimal performance of SharePoint solutions. By leveraging the various caching mechanisms, SharePoint can deliver a seamless and efficient user experience while maximizing resource usage.