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Level up Nil-Externality for Fast Replicated Storage by Prof. Ram Alagappan Grasping the concept of Externalization was a level up moment in how I think about distributed systems. tl;dr Internally present is noise. Externally observable is signal. x.com/DominikTornow/…

Systems pass through invalid states What matters: Only valid sates are externalized For example: A database transitions from consistent → inconsistent → consistent state Yet only valid states are made observable

Still buzzing from Systems Distributed '25 Every talk, every chat, every moment was exceptional. From start to finish, the best conference I've ever attended. Massive thanks to the speakers, the attendees, and the team at TigerBeetle for making this event unforgettable.

Distributed Systems Therapy At SD'24, Joran Dirk Greef and I walked the streets of NYC, unpacking some of the hard problems in distributed systems At SD'25, new city, new streets, same vibes A genuine highlight of the year x.com/DominikTornow/…

Nothing more encouraging than thinking through message passing, idempotency, and systems with my friend (and sage) Dominik Tornow.

Systems Engineering for Agentic Applications Tool Calling is the backbone of agentic apps, allowing LLM-based Agents to observe and act on their environment The Problem LLMs are turn based, they are sequential Parallel tool calling is a crucial step to concurrent AI agents

Our Resonate HQ teammate Cully just dropped a blog post on the current state of Autonomous Applications and Tool Calling His conclusion: 10% AI, 90% Distributed Systems Read here x.com/flossypurse/st…

Parallel tool calling = Multiple tools can run concurrently But there's a limitation: Fork/Join The LLM still operates sequentially → Generates all tool calls in one step → Waits for all results before the next step Concurrent Tools?! Yes Asynchronous Agents?! No

Do you want to discover your worst bugs in production?! Join me at P99CONF and learn how to implement Deterministic Simulation Testing in your own stack Catch and kill the bugs most teams won’t see until they crash their system

A Heisenbug in Distributed Async Await can become a catastrophe in a user's application Without Deterministic Simulation Testing, I would not have the confidence to ship a distributed orchestrator like Resonate HQ x.com/DominikTornow/…

Three years in the making. Kiting with ⁦Dominik Tornow⁩

Systems Distributed started as an idea: blending distributed systems with kitesurfing After an incredible #SD25, we added the final ingredient today 🪁