Memcached and Redis Comparison

	Memcached	Redis
Persistence of	Not supported	Support
Distributed	Support	Support Master-Slave Involves complex operations that may require a distributed lock to support
Thread	Multithreading	Single thread avoids unnecessary context switching and race conditions Thread closure concept, the task of shutting down a thread, naturally avoiding the problem of thread safety , but locks are still required for composite operations that rely on multiple redis operations, And it could be a distributed lock.
Key-value	Support	Support
Complex data types	Not supported	Support
Storage direction	Memory Cache	Memory Cache
Disaster preparedness	Requires a good disaster preparedness plan, otherwise the pump will cause Loss of data in memory, resulting in an unpredictable loss	By supporting persistent storage, you only need to configure the master Can form a good plan for disaster preparedness.
Speed	Pure memory Operations (non-general speed)	The vast majority of requests are purely memory operations (very fast)

Memcached and Redis comparison