https://wid-blog.github.io/en/posts/tech/architecture/Recent content in Architecture on wid's blogHugoenSat, 09 May 2026 00:00:00 +0000https://wid-blog.github.io/en/posts/tech/architecture/microservices-architecture/Sat, 09 May 2026 00:00:00 +0000https://wid-blog.github.io/en/posts/tech/architecture/microservices-architecture/MSA is a decision about which criterion to use to decompose the system. Domain boundary, data ownership, scale pattern, failure isolation — the chosen criterion creates the service boundaries, and those boundaries decide communication and data in turn.https://wid-blog.github.io/en/posts/tech/architecture/event-sourcing-and-cqrs/Thu, 07 May 2026 00:00:00 +0000https://wid-blog.github.io/en/posts/tech/architecture/event-sourcing-and-cqrs/ES and CQRS address how a system’s source of truth is shaped and how its views are separated from it. Adoption cost spreads across the system, so I lean toward adopting only when the value can be stated explicitly.https://wid-blog.github.io/en/posts/tech/architecture/distributed-transactions/Tue, 05 May 2026 00:00:00 +0000https://wid-blog.github.io/en/posts/tech/architecture/distributed-transactions/Distributed transactions are about how a single ACID transaction decomposes across services and how its pieces are reassembled. The roles and trade-offs of 2PC, Saga (Choreography vs Orchestration), and Outbox.https://wid-blog.github.io/en/posts/tech/architecture/zero-downtime-data-transition/Tue, 15 Apr 2025 00:00:00 +0000https://wid-blog.github.io/en/posts/tech/architecture/zero-downtime-data-transition/A three-step pattern combining dual write and fallback read to transition data formats in live services without downtime.https://wid-blog.github.io/en/posts/tech/architecture/horizontal-vertical-slicing/Sun, 10 Mar 2024 00:00:00 +0000https://wid-blog.github.io/en/posts/tech/architecture/horizontal-vertical-slicing/The difference between splitting code by technical layers (horizontal) and by features or domains (vertical). Trade-offs and selection criteria for each approach.https://wid-blog.github.io/en/posts/tech/architecture/layered-architecture/Fri, 23 Feb 2024 00:00:00 +0000https://wid-blog.github.io/en/posts/tech/architecture/layered-architecture/Layered architecture separates code into horizontal layers by technical responsibility. A summary of the four-layer structure, dependency direction rules, and how DIP decouples layers.https://wid-blog.github.io/en/posts/tech/architecture/go-hexagonal-architecture/Wed, 21 Feb 2024 00:00:00 +0000https://wid-blog.github.io/en/posts/tech/architecture/go-hexagonal-architecture/Core concepts of Hexagonal Architecture and its idiomatic implementation in Go using implicit interfaces and package structure for dependency direction control.https://wid-blog.github.io/en/posts/tech/architecture/incremental-cache-refresh/Sat, 20 Jan 2024 00:00:00 +0000https://wid-blog.github.io/en/posts/tech/architecture/incremental-cache-refresh/A pattern for switching from full cache refresh to incremental refresh. Separating data by update frequency and applying change detection reduces network costs.