Why is caching necessary?

Caching is necessary for:

• Reducing latency: It decreases data access time by storing data closer to the point of use (for example, in RAM instead of disk or remote server).
• Reducing load on the data source: It lowers the number of requests to the primary database, API, or other resource, thereby freeing up its resources.
• Increasing throughput: It allows processing more requests by providing quick access to frequently used data.
• Reducing costs: In some cases, accessing cached data is cheaper than accessing the original source (for example, network requests or reading from a slow disk).
• Improving availability: The system can continue to operate even if the main data source is temporarily unavailable, provided there is a cached copy.