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In the video, I discussed how Pinterest built their own in-house time series database named Goku due to performance issues with existing databases. They focused on efficiently storing data in memory, using Facebook's Gorilla for compression, and optimizing aggregation processes. Goku's architecture includes shard-based storage in memory for 24 hours, with periodic flushing to disk. Queries are efficiently handled through a proxy server for scatter-gather aggregation. The simplicity and effectiveness of Goku's design showcase the power of leveraging existing technologies like Gorilla.
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