EmbeddingGemma 2: an open, lightweight multimodal embedding model
deepmind.google·6d ago
AI Engineering
Lobsters·Sep 2·5 min read
Read your own writes, off the primary
TL;DR
Modern applications face challenges with state management after user changes, leading to temporary data disappearance. This issue is exacerbated in collaborative environments where multiple users interact simultaneously.
✦ Why It Matters
Implement strategies to ensure immediate data consistency in your collaborative applications today.
Key Takeaways
- Use WAIT FOR LSN to avoid stale reads from replicas.
- Configure TIMEOUT to manage read latency effectively.
- Store LSN after commits for accurate read operations.
- Monitor failure rates to adjust read architecture as needed.
How It Works
The WAIT FOR LSN command allows a read operation to block until a specified WAL position is replayed on the standby. This ensures that the data being read is up-to-date and reflects the most recent changes made on the primary database.
By retrieving the current WAL flush position after a commit and using it in the WAIT FOR command, applications can effectively synchronize reads with writes.