Description: Revalidation is the process by which it is verified whether the cached content remains valid and can be used to satisfy user requests. This process is crucial in content distribution systems, such as content delivery networks (CDNs), where the goal is to optimize data delivery and reduce latency. Revalidation ensures that users receive the most up-to-date information, avoiding the delivery of outdated content. This mechanism may involve comparing the cached version with the original version on the origin server, using HTTP headers like ‘ETag’ or ‘Last-Modified’. If the content has changed, the new version is downloaded; otherwise, the cached version is used. Revalidation not only improves system efficiency but also contributes to a better user experience by ensuring that the information presented is accurate and current. In an environment where speed and accuracy are essential, revalidation becomes a fundamental component in maintaining the integrity and relevance of the content delivered to end users.
