The Production AI Stack: A Reference Architecture for Real-Time AI Systems
Blog post from Moss
A founder implemented an AI support agent for his ecommerce store using a modern AI stack that included a large language model and a cloud vector database, which initially worked well in terms of functionality but suffered from latency issues. To address this, the system was restructured to embed all necessary information directly into the prompt, eliminating retrieval steps and reducing latency, but this led to problems with context management in longer conversations. The AI architecture is composed of seven layers, including models, inference, search, memory, sessions, orchestration, and deployment, each contributing to the system's overall performance. Latency is identified as a critical constraint for production AI systems, affecting user experience and engagement, with network retrieval often being the largest source of delay. The article argues for rethinking AI infrastructure to prioritize local execution for latency-sensitive operations while utilizing the cloud for coordination and synchronization, suggesting a shift from traditional web architectures to more efficient AI-specific designs like Moss, which integrates retrieval directly within the application runtime to minimize delays.
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