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This article will explain in detail the difference between Memcache and Redis, the content of the article is of high quality, so the editor will share it for you as a reference. I hope you will have some understanding of the relevant knowledge after reading this article.

The concept of Memcache and Redis

Memcache is a distributed cache system developed by Brad Fitzpatrick of LiveJournal, but it is currently used by many websites to improve the access speed of the website, especially for some large websites that need to visit the database frequently. This is a set of open source software released under BSD license license.

Edis is a key-value storage system. Similar to Memcached, it supports relatively more value types to be stored, including string (string), list (linked list), set (collection), and zset (ordered collection). These data types support push/pop, add/remove, and take intersection union and difference sets, and richer operations, and these operations are atomic. On this basis, redis supports a variety of different sorting methods.

The difference between Memcache and Redis

1. Storage mode

Memcache stores all the data in memory and will hang up after a power outage. The data cannot exceed the memory size.

Some of the Redis is stored on the hard disk, which ensures the persistence of the data.

2. Data support types

Memcache's support for data types is relatively simple.

Redis has complex data types.

3. Different underlying models are used.

The underlying implementation between them and the application protocol for communicating with the client are different. Redis directly builds its own VM mechanism, because the general system calls system functions, it will waste a certain amount of time to move and request.

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