~/talk

How Microsoft powers planet-scale AI apps with DiskANN

Talkat Azure Cosmos DB Conf 2025 · on Tuesday, 2025-04-15· [databases, machine-learning]
slides:none on file

DiskANN is a hybrid index that stores compressed vectors in RAM via product quantization and keeps uncompressed vectors and a graph on high‑speed SSDs inside Azure Cosmos DB, enabling cost‑effective planet‑scale vector search. Benchmarks show 10 million 768‑D vectors returning results in under 40 ms and P99 RU charges rising from ~30 to ~70 as scale grows; a 10M‑vector serverless ingest costs roughly $163, storage ~$23/month and 1M searches about $15. Upcoming features include sharded DiskANN and filter DiskANN for faster, tenant‑isolated and filtered searches.

AI-written summary · about

  1. 0:00DiskANN and vector search
  2. 1:09Traditional vector indexing challenges
  3. 2:33DiskANN scalability and cost
  4. 3:36Azure Cosmos DB vector search role
  5. 5:42Cosmos DB fits AI apps
  6. 7:09Vector search in Cosmos DB apps
  7. 8:34Vector search queries in Cosmos DB
  8. 11:03Vector search performance metrics
  9. 12:31Vector search cost analysis
  10. 13:34Scaling to billions of vectors
  11. 15:20Upcoming optimizations and new features
  12. 17:09Hybrid search features
  13. 18:34Get started with vector search
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