How to: Write-through cache
![write-through-cache](https://raw.githubusercontent.com/karanpratapsingh/portfolio/master/public/static/courses/system-design/chapter-I/caching/write-through-cache.png)

Data is written into the cache and the corresponding database simultaneously.

**Pro**: Fast retrieval, complete data consistency between cache and storage.

**Con**: Higher latency for write operations.