Programmer Group

1. The role of registries With the registry, service providers can dynamically add and delete services, and service consumers can pull up the latest services to achieve synchronization after receiving update notifications. Unified configuration can be achieved in the registry, and dynamic adjustment of parameters can be automatically notified t ...

1. Case introduction The results of Mybatis query database are stored in Redis database as key-value pairs instead of secondary cache in Mybatis. When querying the same operation, we can read the results directly in Redis to improve efficiency. 2. Case Realization 2.1 Importing project dependencie ...

Article directory Redis-Xi-01-Redis Distributed Lock (Lua script) Get Lock Release Lock Code test Code Testing process Redis-Xi-01-Redis Distributed Lock (Lua script) In SpringBook project, set key value nx px command is used to ensure the atomic operation of acquiring lock, and Lua script ...

Add dependency <!-- spring boot2.0 Later, the default redisConnectionFactory by LettuceConnectionFactory，I want to continue using it here. jedis，Just do it. exclusion --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-da ...

The last section talks about the configuration and parameter subscription of service introduction. After parameter subscription, the consumer obtains the provider url, the configurer url, and the routing URL under the corresponding interface classifi ...

Introduction to Redis Redis is a key-value-oriented memory database for data types, which can meet our needs for fast reading and writing of massive data. Is a nosql non-relational database Redis keys can only be string-type values that can be of ...

First is the project address: https://github.com/maqiankun/distributed-id-redis-generator For Redis Cluster to generate distributed ID s, here's the first thing to learn about the EVAL, EVALSHA command when redis uses the lua script: https://www.runoob.com/redis/scripting-eval.htmlhttps://www.runoob.com/redis/scripting-evalsha.html Explain how ...

Redis Redis Command Reference Web Site: http://doc.redisfans.com/ Introduction to Redis Redis is completely open source, free of charge, complies with BSD protocol, and is a high-performance key-value database. Redis and other key - value caching products have three features: Redis supports dat ...

(1) Introduction to HyperLogLog HyperLogLog was added at Redis version 2.8.9. The HyperLogLog algorithm is an algorithm for cardinality statistics. It only takes 12 KB of memory per HyperLogLog key to calculate the cardinality of nearly 2^64 different elements.HyperLogLog is suitable for large data volumes because it is relatively ...

MULTI, EXEC, DISCARD and WATCH are the basis of Redis transactions1. The MULTI command is used to open a transaction and always returns OK.After MULTI is executed, the client can continue to send any number of commands to the server, which will not be executed immediately, but will be placed in a queue. 2. When the EXEC command is invoked, all ...