Key points to understand Caching
Caching can be used in a variety of different systems, including web applications, databases, and operating systems. In each case, caching works by storing data that is frequently accessed in a location that is closer to the user or application. This can include storing data in memory or on a local hard drive.
- How it works:
- When data is requested, the system first checks if the data is stored in the cache.
- If it is, the system retrieves the data from the cache rather than from the original source.
- This can significantly reduce the time it takes to access the data.
- Types of caching:
- There are several types of caching, including in-memory caching, disk caching, and distributed caching.
- In-memory caching stores data in memory, while disk caching stores data on a local hard drive.
- Distributed caching involves storing data across multiple systems to improve availability and performance.
- Cache eviction:
- Caches can become full over time, which can cause performance issues.
- To prevent this, caches are typically designed to automatically evict older or less frequently accessed data to make room for new data.
- Cache consistency:
- Caching can introduce issues with data consistency, particularly in systems where multiple users or applications are accessing the same data.
- To prevent this, systems may use cache invalidation techniques or implement a cache consistency protocol to ensure that data remains consistent across all users and applications.
Caching – System Design Concept
Caching is a system design concept that involves storing frequently accessed data in a location that is easily and quickly accessible. The purpose of caching is to improve the performance and efficiency of a system by reducing the amount of time it takes to access frequently accessed data.
Important Topics for Caching in System Design
- What is Caching
- How Does Cache Work?
- Where Cache can be added?
- key points to understand Caching
- Types of Cache
- Applications of Caching
- What are the Advantages of using Caching?
- What are the Disadvantages of using Caching?
- Cache Invalidation Strategies
- Eviction Policies of Caching