Redis elimination strategy list

take Redis When used as a cache , If the memory space is full , It will automatically expel old data .

Redis Six elimination strategies
noeviction： When memory usage reaches a threshold , All commands that cause memory requests will report errors .
allkeys-lru： In the primary key space , Priority to remove recently unused key.( recommend )
volatile-lru： In key space with expiration time set , Priority to remove recently unused key.
allkeys-random： In the primary key space , Randomly remove a key.
volatile-random： In key space with expiration time set , Randomly remove a key.
volatile-ttl： In key space with expiration time set , With an earlier expiration date key Remove first