The Proxy pattern provides a surrogate or placeholder for another object to control access to it. This can be used to add functionality before or after the original object’s method is executed, or to simply delay the creation or access of the expensive object until it’s actually needed. It essentially …

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The Database per Service pattern dictates that each microservice should have its own dedicated database. This contrasts with a shared database approach where multiple services access a single database, which is a common anti-pattern in microservice architectures. The key principle is to decouple data storage from the …

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The Distributed Cache pattern addresses performance bottlenecks in applications that rely heavily on data retrieval. Instead of repeatedly querying a database or performing complex calculations on every request, frequently accessed data is stored in a fast, distributed key-value store. This reduces latency, increases …

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Immutable infrastructure is a practice where servers are never modified after they’re provisioned. Instead, if a change is required, a new server is provisioned with the updated configuration, and the old server is replaced. This approach treats infrastructure as code, emphasizing version control and repeatability. It …

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The Init Container pattern addresses the challenge of application dependencies and setup requirements in container orchestration systems like Kubernetes. It defines a specialized container that runs before the application containers within a Pod. Init Containers are crucial for ensuring that shared resources are …

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The Leader-Follower pattern is a concurrency pattern used to maintain data consistency across multiple nodes in a distributed system. One node is designated as the “leader” and is responsible for handling all write operations. Other nodes are “followers” that replicate the leader’s data …

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Map-Reduce is a programming model and an associated implementation for processing and generating large datasets. It works by splitting the dataset into independent chunks, which are then processed in parallel by “map” functions. These map functions output key-value pairs. Subsequently, “reduce” …

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The Proactor pattern is a concurrent design pattern that tackles the challenges of handling numerous asynchronous operations. It decouples the initiation of an asynchronous operation from its completion, allowing a single thread (the proactor) to manage multiple operations without blocking. When an operation completes, …

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Shadow Deployment is a technique to test changes in a live production environment without impacting real users. It involves duplicating real production traffic to a new, “shadow” version of the application. This allows for observing the new system’s behavior under realistic load, identifying potential …

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The Supervisor-Worker pattern addresses the challenges of managing and maintaining long-running processes or tasks. A Supervisor component is responsible for monitoring and controlling one or more Worker components. The Workers perform the actual work, while the Supervisor ensures that Workers stay alive, restarts …

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