Databricks Network Configuration delivery to Tens of Millions of Serverless VMs
Summary
Databricks rebuilt serverless network configuration delivery around an event-driven pipeline, replacing synchronous upstream calls with background pre-computation served from a snapshot store, which removed expensive multi-service aggregation from the cluster-startup path. At billions of requests per day, the change cut RPC p99 latency by 98.5% (5,000ms to 75ms), lifted availability to 99.99%, and reduced upstream call volume by 86%.
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