Shulou(Shulou.com)06/01 Report--

Today, the editor is to share with you about the introduction of redis and the role of redis, many people do not understand, today, in order to let you know more about redis, so to sum up the following content, let's look down together. I'm sure you'll get something.

The author of redis, Salvatore Sanfilippo, is from Sicily, Italy, and now lives in Catania. Currently works for Pivotal. The screen name he uses is antirez.

Redis is a key-value storage system. Similar to Memcached, it supports relatively more value types, including string (string), list (linked list), set (collection), zset (sorted set-ordered collection), and hash (hash type).

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.

Like memcached, data is cached in memory for efficiency. The difference is that redis will periodically write updated data to disk or modify operations to additional record files, and on this basis to achieve master-slave (master-slave) synchronization.

Redis is a high-performance key-value database. The emergence of redis makes up for the deficiency of key/value storage such as memcached to a great extent, and can play a good complementary role to relational database in partial situations.

It provides clients such as Java,C/C++,C#,PHP,JavaScript,Perl,Object-C,Python,Ruby,Erlang, which is easy to use.

Redis supports master-slave synchronization. Data can be synchronized from the master server to any number of slave servers, which can be the master server associated with other slave servers. This makes it possible for Redis to perform single-layer tree replication.

Save the disk can intentionally or unintentionally write to the data. Because the publish / subscribe mechanism is fully implemented, when the slave database synchronizes the tree anywhere, it can subscribe to a channel and receive the complete message release record of the master server. Synchronization is helpful for scalability and data redundancy of read operations.

The official website address of redis, very easy to remember, is redis.io. (the domain suffix io belongs to the national domain name and is british Indian Ocean territory, that is, the British Indian Ocean Territory)

Currently, Vmware is funding the development and maintenance of redis projects.

The above is about the introduction of redis and the role of redis a brief introduction, of course, the detailed use of the above differences have to be used by everyone to understand. If you want to know more, welcome to follow the industry information channel!

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