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Linkerd is the pragmatic service mesh for Kubernetes, prioritizing simplicity over feature catalogues. Its Rust proxy uses ~10 MB RAM per sidecar versus 50-100 MB for Envoy under Istio. This comparison explains when adopting it pays off, what it costs to operate, and when Istio makes more sense.
With 30 or more microservices, end-to-end tests become slow, fragile and impractical. Pact implements consumer-driven contract testing: the consumer defines what it expects, the provider verifies it in its own CI pipeline, with no shared environment needed. The result is integration proof in seconds, not minutes.
Migrating from monolith to microservices means splitting a single system into independent services that deploy and scale on their own. It gains granular scalability and team autonomy, but adds real operational complexity: stable interfaces, Kubernetes orchestration, and a mature DevOps culture are conditions, not optional extras, for the migration to pay off.
Choose modular architecture when your team has fewer than ten people and ships the system as a single unit; choose microservices when separate teams need to deploy independently or when specific components require very different scaling, in exchange for higher operational complexity.
