Redis is a powerful, distributed memory key-value store. It offers high scalability, performance, and data durability.
At its core, Redis is a sorted set data structure. This means that each key is compared to every other key in the set, and the smallest (or largest) key is returned.
Redis uses a hash function to calculate the key-value pair for a given request.
Redis uses 16384 slots to store data. This means that it can store 2^64 – 1 values, or 16383 keys.
This number was chosen because it is an integer that is larger than the maximum number of characters that can be stored in a 32-bit unsigned integer (2^31 – 1 = 16383).
Since Redis uses a hash function to calculate key-value pairs, it is possible to have collisions. In other words, two keys can have the same value.
When this happens, Redis will use the last stored value for the conflicting key. This way, multiple clients can access the same data without conflict.
Because of its high scalability and performance, Redis is often used in web applications and large scale systems. Its unique hash function makes it resistant to race conditions and other issues that can occur with other data structures.
