Memcached vs Redis: What are the differences?
Memcached: High-performance, distributed memory object caching system. Memcached is an in-memory key-value store for small chunks of arbitrary data (strings, objects) from results of database calls, API calls, or page rendering; Redis: An in-memory database that persists on disk. Redis is an open source, BSD licensed, advanced key-value store. It is often referred to as a data structure server since keys can contain strings, hashes, lists, sets and sorted sets.
Memcached can be classified as a tool in the "Databases" category, while Redis is grouped under "In-Memory Databases".
"Fast object cache", "High-performance" and "Stable" are the key factors why developers consider Memcached; whereas "Performance", "Super fast" and "Ease of use " are the primary reasons why Redis is favored.
Memcached and Redis are both open source tools. It seems that Redis with 37.4K GitHub stars and 14.4K forks on GitHub has more adoption than Memcached with 9K GitHub stars and 2.6K GitHub forks.
According to the StackShare community, Redis has a broader approval, being mentioned in 3261 company stacks & 1782 developers stacks; compared to Memcached, which is listed in 755 company stacks and 267 developer stacks.
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