Comparison
| Redis | Memcached |
|---|---|
| 5 avalable data types(String,Hash,List,Set,Sorted Set) | only string |
| key, value up to 512 MB | key up to 250 bytes, value up to 1 MB |
| single-threaded | multi-threaded |
| not lose data | have chance losing data |
| centralized | distributed |
| horizontally scale | vertically scale |
| 6 policies of eviction(No eviction, LRUs) | LRU(Least Recently Used) |
| periodically store data to disk | store to RAM |