Thursday, January 29, 2015

Redis core implementation

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I hope Redis doesn't need long introduction for readers of the post in a blog about key-value stores, because Redis is by far the most popular key-value store (according to db-engines.com).

This post surveys Redis internal implementation: data structures, algorithms, memory layout, footprint and performance characteristics. In the end I list weaknesses I see in all this stuff.

This post should be useful for those who want to know how does Redis actually work but don't want to spend a day for reading the source code.

Durability/persistance algorithms, network subsystem, replication and Redis cluster are out of scope of this post.

Read more here

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