Redis
A fast in-memory data store, usually doing cache duty.
Redis is an in-memory data store, most often used as a cache in front of a web application.
Installation
On a Debian server:
sudo apt install redis-server
The one thing worth doing straight away is stopping it from eating all the machine’s memory.
sudo vi /etc/redis/redis.conf
If you’re using it purely as a cache, and depending on what your application expects, you can cap the memory and tell Redis to evict the least recently used keys when it hits the ceiling.
maxmemory 16gb
maxmemory-policy allkeys-lru