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OpenAI Habitat Cuts Read Latency from 120ms to 10ms with Rust Rewrite and CDC Caching

·2026.10.30 08:52

Key point

A Rust rewrite and CDC-based caching reduced global read latency by 12x.

Details

  • Habitat is a distributed storage platform that provides millisecond-level responses to over one billion users across 40 regions.
  • It stabilized Azure Cosmos DB multi-tenancy by addressing hot key throttling, QoS, and improved serverless mode, reducing capacity planning burden.
  • It eliminated proxy overhead with Rust and applied CDC-based invalidation caching, reducing p50 read latency from 120ms to 10ms.
  • It built a CDC platform that delivers changes from thousands of containers to Kafka at millions of events per second, supporting real-time indexing and analytics.
  • It is developing a custom storage system combining RocksDB Cloud and Raft replication for future exabyte-scale data.
openairustcachingcdcazure-cosmos-dbdistributed-storagehabitat
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