Pub/Sub Before we dive into Kafka let’s start with a quick recap on what publish/subscribe (pub/sub) messaging is. Publish/subscribe is a messaging pattern where the sender (or the publisher) doesn’t send data directly to a specific receiver. Instead, the publisher classifies the messages without knowing if there are any subscribers […]
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What is the Lightning Network? Lightning Network is a payment protocol that operates on the top of the Bitcoin network (“Layer 2” solution). It’s a network of decentralised nodes that allows for sending a huge number of transactions exteremly fast and for a negligible fee (even sub-satoshi level). The Lightning […]
What is the Two Generals’ Problem? The Two Generals’ Problem, also known as the Two Generals’ Paradox or the Two Armies Problem, is a classic computer science and computer communication thought experiment that we’re going to talk about in this post. First of all, to avoid any confusion, we need […]
What is the Actor Model? Actor Model is a conceptual model of concurrent computation originated in 1973. In the Actor Model, an actor is a fundamental unit of computation and everything is an actor. The only allowed operations for an actor are: to create another actor, to send a message […]