Programmer Group

background Severe users of redis should have encountered the use of DEL commands to delete larger keys, or when using FLUSHDB and FLUSHALL to delete databases containing a large number of keys, resulting in redis blocking; in addition, redis in cleaning up expired data and eliminating memory overrun data, if it happens to hit a large number of ...

Redis Distributed Lock Command Setnx if and only if the key does not exist. If the given key already exists, setnx does nothing. Setnx is the abbreviation of "set if not exists" (if not, set). Setnx has atomicity. get set first gets the old value, then sets the new value, and returns the old value of the key, which i ...

Integrating Redisson with SpringBoot I. Introducing Dependence <dependency> <groupId>org.redisson</groupId> <artifactId>redisson-spring-boot-starter</artifactId> <version>3.10.6</version> </dependency> 2. Adding configuration ...

Article Directory Set (set) Methods in set sadd smembers sismember scard spop sunion srandmenber sinter srem smove sdiffstore sdiff sscan sinterstore sunionstore Set (set) Redis Set is an unordered collection of string types.Collection members are unique, which means that no duplicate data can appear in the collection. ...

I. Deployment environment System: centos7 X64 bit (32 bit unsupported) core version II. Deployment process The download address of the project is https://github.com/mogujie/TeamTalk.git, which is a version of the project three years ago. Some of the scripts have 404 addresses, which is the source part of mariadb, and need to ...

Recently, in the company API gateway rewrite, the company uses serverMesh for service registration, invocation, here combined with the previous study of API Gateway Services for a simple summary and analysis. Since a lot of nginx-related stuff has been used, here is a record: Using openresty in nginx Add nginx module Edit the conf configurat ...

Summary of redis use (1) (redis client use) NoSQLNoSQLFrom Baidu Encyclopedia NoSQL, refers generally to non-relational databases.With the rise of Internet web2.0 websites, traditional relational databases have been unable to cope with web2.0 websites, especially Web 2.0 pure dynamic websites of super-large-scale and highly concurrent SNS type, ...

We know that the bottleneck of a program is the database. We also know that the speed of memory is much faster than that of hard disk. When we need to retrieve the same data repeatedly, we request database or remote service again and again, which leads to a large amount of time consuming in data query or remote method invocation ...

Proper noungeographic geographyRadius radius range; radius (distance); circular area measured by radius redis GEO IMPLEMENTATION The redis GEO implementation mainly includes the following two technologies: 1. Use geohash to save the coordinates of geographic location.2. Use sort set to save the set of geographical location. (emphasis: sor ...

Redis Distributed Cache Redis is an open source Key-Value database that stores data in memory and is written in C. Enterprise development typically uses redis for caching. operation flow Get data from redis first, return directly if you get data, you don't need to access the database. If you can't get data, you can query ...