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Kafka Summit London 2019

May 13-14, 2019 | London


The Power of Event Driven Caches

Session Level: Intermediate

“There are only two hard things in Computer Science: cache invalidation and naming things.” — Phil Karlton

Today’s microservice-based architectures rely on caches to hide latency and provide more responsive experiences for users. Unfortunately, these caches can be tricky to get right. Who places the data in the cache? When should the cached data expire? What happens when the cache or its datastore fail? We found that by using an event-based push model, we could avoid most of the pitfalls associated with traditional caches. This talk will cover the basic concept of push-based caches and their implications. It will delve into how you might build such a cache and what to do when your dataset is large, as well as look at our experience using these kinds of caches in production at Bloomberg.

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