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High-Level Design of a Distributed Cache

Design the architecture for a highly scalable distributed cache system. Define essential functional and non-functional requirements like high performance, consistency, and availability. Explore critical design choices, including storage hardware, eviction policies, and the roles of cache clients and servers in the high-level System Design.

In this lesson, we will design a distributed cache. We will also discuss the trade-offs and design choices involved in developing the solution.

Requirements

Let’s start by defining the requirements.

Functional

The system must support the following operations:

  • Insert data: Users must be able to add an entry to the cache.

  • Retrieve data: Users must be able to retrieve data associated with a specific key.

Functional and non-functional requirements of a distributed cache
Functional and non-functional requirements of a distributed cache

Non-functional requirements

We must meet the following non-functional requirements:

  • High performance: The primary goal is fast data retrieval. Both insert ...