Introduction to Redis Data Structures
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Bitmaps are a compact data structure in Redis that store boolean values to save memory space. They are useful for applications needing real-time analytics on large datasets like MOOCs. Bitmaps map boolean values to bits and support bitwise operations through commands like SETBIT, GETBIT, and BITCOUNT. While sets are easier to use for smaller datasets, bitmaps are better suited for domains with more than 232 bits due to their compact memory storage.
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![Internal Implementation
Redis strings are implemented as Binary
Safe Strings
Internally called Simple Dynamic String
(SDS)
native char[]
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- 1. Bitmaps Introduction to Redis Data Structures:
- 2. What is Redis? Open Source, NoSQL Database Used by: Twitter, Pinterest, GitHub Stores Advanced Data Structures Client Support: Java, C, Node.js etc Introduction to Redis Data Structures: Bitmaps
- 3. What are Bitmaps? Also called Bit Arrays/Vectors Helps map boolean information into a compact representation Widely used when memory space is a premium Largest Domain Support: 232 bits Introduction to Redis Data Structures: Bitmaps
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- 5. Bit Operations in Redis SETBIT GETBIT BITOP BITCOUNT BITPOS Introduction to Redis Data Structures: Bitmaps
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