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Top caching strategies

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Top caching strategies

Alex Xu
Mar 3, 2022
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Top caching strategies

blog.bytebytego.com

What are the top caching strategies?

Read data from the system:
🔹 Cache aside
🔹 Read through

Write data to the system:
🔹 Write around
🔹 Write back
🔹 Write through

The diagram below illustrates how those 5 strategies work. Some of the caching strategies can be used together.

I left out a lot of details as that will make the post very long. Feel free to leave a comment so we can learn from each other. 


If you enjoyed this post, you might like our system design interview books as well.

SDI-vol1: https://amzn.to/3tK0qQn

SDI-vol2: https://amzn.to/37ZisW9

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Top caching strategies

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3 Comments
Akshay Baura
Jun 30, 2022

**Write-through**: data is written in cache & DB; I/O completion is confirmed only when data is written in both places

**Write-around**: data is written in DB only; I/O completion is confirmed when data is written in DB

**Write-back**: data is written in cache first; I/O completion is confirmed when data is written in cache; data is written to DB asynchronously (background job) and does not block the request from being processed

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whitetiger
Oct 10, 2022

What is the difference between write-around and cache-aside? They both seem very similar.

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