Programmer Think

1, Background Recently, after looking at the knowledge of redis, I found that a new data type Stream has been generated in redis5, which is somewhat similar to the design of kafka and can be used as a simple message queue. 2, Characteristics of Stream type in redis It is persistent and can ensure no data loss. Support message multicast and ...

catalogue introduction 1, Relational database and non relational database (1) , relational database (2) , non relational database (3) , relational database and non relational database (1) Different data storage methods (2) . different expansion modes (3) Support for transactional is different (4) Background of non relational database ...

As a data structure storage system in memory, Redis can be used as database, cache and message middleware. Its value supports many types of data structures. The basic data structures include: strings, hashes, lists, sets and sorted sets. These five data structures are often used in our work and often asked during the interview. Therefore, maste ...

Data type analysis of Redis source code - ZipList The current Redis analysis version is 6.2, which should be noted. ZipList, a compressed list, can contain multiple nodes at will. Infrastructure ZipList Compress the list. Its overall layout, < zlbytes > < zltail > < zllen > < entry > < entry >... < entry &g ...

demo address: https://gitee.com/pdh_gitee/redis-cache-demo.git. Redis must be available locally, which is the premise. All demo s are tested on windows. In the spring boot project, you can usually use the automatic cache policy, or you can use the RedisTemplate class to operate redis, and redis can be configured (of course, this is trou ...

preface This paper uses springsecurity oauth2 + redis to realize single sign on. Now, if you want to use springsecurity to realize single sign on, the more popular method is to use jwt. Although jwt has many advantages and can carry a lot of information, it is stateless, and the server does not need to save its information, so there is a ...

1, Redis Cluster Redis Cluster is a distributed solution officially provided by redis. When encountering bottlenecks such as memory, concurrency and traffic, Cluster architecture can be used to achieve the purpose of load balancing. Official documents: https://redis.io/topics/cluster-tutoria 1. Why use redis cluster cluster? 1.first Redis Sing ...

Idempotency concept The results of one request or multiple requests initiated by the user for the same operation are consistent, and there will be no side effects due to multiple clicks. The simplest example is payment. The user pays after purchasing goods, and the payment deduction is successful. However, when the result is returned, th ...

After Redis 3.2, geographic coordinate data management is supported. Add the given coordinate elements (latitude, longitude, name) to the specified key. These data will be stored in an ordered set. You can calculate the distance between two coordinate points through GEORADIUS, or query the data within a coordinate radius using GEORADIUS and GEO ...

catalogue Introduction to Redis redis compilation and installation   1. redis configuration of server1 2. redis installation of server2   3. Configuring redis for server3 3, redis master-slave replication 4, Sentine master-slave automatic switching   5, redis cluster Redis cluster summary 1. Cluster construction Build ...