System Design Playlist - Caching in distributed systems: A friendly introduction

Caching is an amazingly effective technique to reduce latency. It helps build scalable, distributed systems. We first discuss what is a cache and why we use it. We then talk about the key features of a cache in a distributed system. Cache management is important because of its relation to cache hit ratios and performance. We talk about various scenarios in a distributed environment. Benefits of a cache: 1. Saves network calls 2. Avoids repeated computations 3. Reduces DB load Drawbacks of a cache: 1. Can be expensive to host 2. Potential thrashing 3. Eventual consistency Cache Write Policies: 1. Write-through 2. Write-back 3. Write-around Cache Replacement Policies: 1. LRU 2. LFU 3. Segmented LRU 00:00 What is a cache? 00:20 Caching use cases 03:42 Caching limitations 06:33 Drawbacks 09:42 Cache Placement Caching resources listed together (click on the resources tab): https://interviewready.io/learn/system-design-course/caches-deep-dive/caching-basics You can follow me on: Github: https://github.com/InterviewReady/system-design-resources Instagram: https://www.instagram.com/interviewready_/ LinkedIn: https://www.linkedin.com/company/interview-ready/ Twitter: https://twitter.com/gkcs_ #Caching #DistributedSystems #SystemDesign