What are the benefits of using redis?
Benefits of redis:
(1) It is fast because the data is stored in the memory. Similar to HashMap, the advantage of HashMap is the time of search and operation. The complexity is O(1)
(2) Support rich data types, support string, list, set, sorted set, hash
(3) Support transactions, operations are atomic , the so-called atomicity means that all changes to the data are either executed or not executed at all
(4) Rich features: can be used for caching, messaging, and setting the expiration time by key, which will be automatically deleted after expiration
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