Redis

Description:

• Store data in memory so it is very fast
• https://redis.io/glossary/cache-coherence/#:~:text=MSI%20Protocol%20(Modified%2C%20Shared%2C%20Invalid)&text=States%20and%20Transitions%3A%20The%20MSI,differs%20from%20the%20main%20memory.

Cache Coherency