The add by Zhj:redis does not have an absolute advantage over memcached compared to the performance. We use Redis because it supports more data types, and when the memory allocated to Redis is full,
Redis also does not delete data that is not expired, but instead writes some data to disk in a certain algorithm, thereby opening up memory space for Redis to store new data. And Memcached is based on a certain algorithm directly
Delete the data that has not expired. Reddis can also be a message queue, but I'm not sure which is more advantageous than traditional Message Queuing activemq RabbitMQ zeromq. Look back and take a look.
Original: http://www.cnblogs.com/linjiqin/archive/2013/05/27/3101694.html
1. Introduction to Redis
Redis is a key-value storage system. Similar to memcached, it supports storing more value types, including string (string), list (linked list), set (set), Zset (sorted set-ordered collection), and HASHS (hash type). These data types support Push/pop, Add/remove, and intersection-set and difference sets, and richer operations, and these operations are atomic. Based on this, Redis supports sorting in a variety of different ways. As with memcached, data is cached in memory to ensure efficiency. the difference is that Redis periodically writes the updated data to disk or writes the modified operation to the appended record file, and Master-slave (Master-Slave) synchronization is implemented on this basis.
Redis is a high-performance Key-value database. The emergence of Redis, to a large extent, compensates for the lack of memcached such key/value storage, in some cases can be a good complement to the relational database. It provides the python,ruby,erlang,php client, which is very convenient to use.
2. Installing Redis under Windows
Https://github.com/dmajkic/redis/downloads. Redis supports 32bit and 64bit to download. According to their actual situation choice, I choose 32bit. Copy the contents of the 32bit file to the directory that needs to be installed, for example: D:\dev\redis-2.4.5.
Open a CMD window and use the CD command to switch to the specified directory (D:\dev\redis-2.4.5) to run Redis-server.exe redis.conf. The following interface appears after running.
This means that the Redis server has been successfully installed.
Reopen a CMD window, run the client, switch to the specified directory (D:\dev\redis-2.4.5) to run redis-cli.exe-h 127.0.0.1-p 6379, where 127.0.0.1 is the local IP, 6379 is the default port on the Redis server. Running successfully, as shown in, indicates that the client has established a TCP connection with the server .
In this way, it is not easy to build a Redis windows environment.
In this way, it is not easy to build a Redis windows environment.
The environment has been set up, always test it. For example: Store a string with key test,value as Hello Word and get the key value.
Correct output hell Word, test success!