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Absolutely Everything That I Know About Database Indexes

After mentioning LSM-Trees, B-Trees, R-trees, etc. in passing for over a year in my system design videos, I've received enough requests to make an entire video about it that I finally caved and decided to make another system concepts video. NOTES & CORRECTIONS: excalidraw file: https://excalidraw.com/#json=z6OfXNuA... screenshots of the excalidraw file: https://imgur.com/a/C37N2hh text files: overview.md - https://pastebin.com/HgmV8dRi indexing.md - https://pastebin.com/KtuELqhJ the excalidraw link and screenshots above contain the corrected version of the drawing for the "write heavy" scenario 00:00 Intro 00:45 Resources & References 01:26 Key Concepts 01:36 Key Concept: RUM Conjecture 03:08 Key Concept: DB = WAL + Materialized View 03:50 No Index 06:45 Primary Keys 08:56 Partitioning Strategies: Hash Partitioning vs. Range Partitioning 11:52 K-V Stores 14:32 B-Trees vs. LSM-Trees 20:33 Secondary Indexes 24:15 Local Secondary vs. Global Secondary 29:02 Multi-Dimensional Indexes 29:37 Concatenated Indexes 31:52 R-Trees vs. Quad-Trees vs. Geo-Hashes 37:33 Inverted Indexes 42:15 Skip Lists 44:20 Vector Indexes 48:42 Data Cubes & Materialized Views 50:56 Count-Min Sketch #systemdesign #programming