EmbeddingGemma 2: an open, lightweight multimodal embedding model
deepmind.google·6d ago
AI Engineering
Lobsters·Aug 15·5 min read
Improving system safety with Temporal Logic of Actions (TLA+)
TL;DR
The garbage collector for Depot Registry was rebuilt using TLA+, a formal specification language, which uncovered a previously undetected bug. This approach emphasizes the importance of modeling system behavior to catch elusive distributed systems bugs.
✦ Why It Matters
Consider using TLA+ to model critical components of your systems to catch hidden bugs.
Key Takeaways
- Use TLA+ for modeling complex distributed systems.
- Identify critical invariants to guide your model checking.
- Leverage automated tools to generate TLA+ specifications.
- Implement S3 versioning to ensure safe deletions in content-addressable storage.
How It Works
TLA+ allows developers to create a simplified model of their system, focusing on states and transitions. The model checker, TLC, explores all possible states and interleavings, ensuring that specified invariants hold true.
For example, in the Depot Registry, the model checked that a committed manifest never loses its associated blob data, revealing potential race conditions that traditional tests missed.