Is Redis memory based or disk based?

Question

Redis is an in-memory but persistent on disk database, so it represents a different trade off where very high write and read speed is achieved with the limitation of data sets that can't be larger than memory.

Is Redis in-memory or on disk?

Performance. All Redis data resides in memory, which enables low latency and high throughput data access. Unlike traditional databases, In-memory data stores don't require a trip to disk, reducing engine latency to microseconds.

Does Redis use RAM or SSD?

Long story short, REDIS allows you to store key-value pairs on your RAM. Since accessing RAM is 150,000 times faster than accessing a disk, and 500 times faster than accessing SSD, it means speed. But, we are already using RAM for most of our operations!

Which memory is used by Redis?

Switch to 32-bits. Redis gives you the following statistics for a 64-bit machine. An empty instance uses ~ 3MB of memory. 1 Million small Keys -> String Value pairs use ~ 85MB of memory.

How does Redis store in-memory?

Redis is an In-Memory Database(IMDB) as it relies on main memory of computer for data storage while others use Disk Storage database mechanism. That is why Redis is faster than disk-optimized databases because disk access is slower than memory access.

Expert · Answer