Distributed-Systems

4 posts
2026

Message Queue vs Publish-Subscribe: What Is the Difference?

An order is placed. Inventory must reserve stock, billing must create an invoice, analytics must record the sale, and an email must reach …
message-queues publish-subscribe event-driven-architecture distributed-systems system-design
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Message Queues Explained: How Asynchronous Systems Work

A customer clicks Place order. The payment succeeds, but generating the invoice takes 12 seconds and the email provider is having a bad …
message-queues system-design distributed-systems scalability software-architecture
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Monolithic Architecture vs Microservices: How to Choose

A team has one application, one database, and one deployment pipeline. Releases are still manageable, but checkout changes keep colliding …
software-architecture microservices system-design distributed-systems scalability
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System Design Caching: Cache-Aside, Expiration, and Invalidation

A cache is a copy. Every useful cache design must therefore answer a harder question than “What TTL should we use?”: How wrong may this copy …
caching system-design distributed-systems redis
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