CoRecursive: Coding Stories Tech Talk: Rethinking databases and Noria with Jon Gjengset
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Apr 30, 2019 Jon Gjengset, a leader on the Noria project at MIT CSAIL, dives into innovative database management. He discusses how Noria redefines performance by integrating caching directly into the database, using materialized views for query optimization. Jon elaborates on the ingenious data flow model and how it enhances cache management compared to traditional systems like MySQL. He also shares insights on teaching Rust through live coding, showcasing its unique features that prevent bugs while empowering developers.
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Noria's Dataflow Cache Model
- Noria is designed to maintain caches internally by understanding how writes affect cached state.
- It treats queries as data flow through a graph, propagating updates efficiently to keep caches fresh.
Lobsters Example Demonstrates Noria
- Jon demonstrated Noria using a Lobsters site example, caching vote counts and front page results incrementally.
- The database automatically updates complex hotness scores on writes, speeding up reads dramatically.
Partial Materialized Views Innovation
- Noria supports partial materialized views storing only recently accessed items, unlike traditional full views.
- This approach avoids combinatorial explosion and reduces memory pressure in caching large query results.