Using Ristretto to cache objects in Go

development golang cache ristretto

Introduction In my previous article on Greycell, I wrote about caching objects using tags and how it can make cache invalidation easier. I used Redis as a temporary store for our objects that needed to be cached. Although Redis is really good for this, I wanted an embedded key-value store in order to avoid additional dependency of maintaining a Redis server. When I explored further, I came across many embedded key-value store like groupcache, fastcache, burrow cache and Dgraph’s Ristretto.

Caching records by tags in Go

development golang cache

Cache Invalidation When frequently accessed data which is stored in a cache is updated, it is necessary for the application to evict the stale data from the cache. So when subsequent requests for the same data is received by the application, it will retrieve fresh data from the database and store it in the cache. This way, users will never receive stale data from the application. The process of cache invalidation can be made easier by tagging data with specific tags when storing in the cache.

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Bharghava Varun Ayada is a Staff Software Engineer at Twilio Segment, living in Bangalore, India. This blog is about software engineering, system design, distributed systems and DevOps.


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