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What are the application scenarios of Redis?

What are the application scenarios of Redis?

What are the application scenarios of Redis? Caching: This should be the main function of Redis, and it is also an essential mechanism for large websites. Proper use of cache can not only speed up data access, but also effectively reduce the pressure on back-end data sources. Shared Session: For some services that rely on the session function, if you need to change from a single machine to a cluster, you can choose redis to manage the session uniformly. Message queue system: The message queue system can be said to be an essential basic component of a large website because it has the characteristics of business decoupling and non-real-time business peak shaving. Redis provides publish and subscribe functions and blocking queue functions. Although it is not powerful enough compared with professional message queues, it is suitable for general

Jun 02, 2023 pm 07:10 PM
redis
How to use Gaussian Redis to implement secondary index

How to use Gaussian Redis to implement secondary index

1. Background When mentioning index, the first impression is the term database. However, Gaussian Redis can also implement secondary index! ! ! Secondary indexes in Gaussian Redis are generally implemented using zset. Gaussian Redis has higher stability and cost advantages than open source Redis. Using Gaussian Rediszset to implement business secondary indexes can achieve a win-win situation in performance and cost. The essence of indexing is to use ordered structures to speed up queries, so numeric and character type indexes can be easily implemented through the Zset structure Gaussian Redis. •Numeric type index (zset is sorted by score): •Character type index (zset is sorted lexicographically when the scores are the same

Jun 02, 2023 pm 06:53 PM
redis
How to use redis in ThinkPHP5

How to use redis in ThinkPHP5

Premise: Because this article mainly focuses on using redis in thinkPHP5, I will not specifically explain the installation of redis. However, I would like to remind you that after installing redis, be sure to enable the php.ini extension, otherwise you will still be unable to use redis. . Configuration 1. Students who can use ThinkPHP5 know that TinkPHP5 encapsulates the cache class. We only need to fill in the cache configuration items in the cache in /application/congfig.php to use it (as shown below). 2. From the /thinkphp/library/think/cache/driver/Redis.php file

Jun 02, 2023 pm 06:25 PM
redis thinkphp
How to set redis to enable auto-start on Linux

How to set redis to enable auto-start on Linux

When redis starts up in centos7, create the redis.service file vi/etc/systemd/system/redis.service in the system service directory and write the following content: [Unit]Description=redis-serverAfter=network.target[Service]Type =forkingExecStart=/usr/local/redis/bin/redis-server/usr/local/redis/bin/redis.conf (fill in the location of your redis configuration file here

Jun 02, 2023 pm 05:58 PM
Linux redis
How does Springboot integrate redis to achieve simple data writing and reading?

How does Springboot integrate redis to achieve simple data writing and reading?

引入maven依赖：org.redissonredisson-spring-boot-starter${redission}redisUtil.javapackagecom.gllic.workweixin.utils;importorg.redisson.api.RBucket;importorg.redisson.api.RedissonClient;importorg.springframework.stereotype.Component;importjavax.annotation.R

Jun 02, 2023 pm 05:25 PM
redis SpringBoot
How to install redis on centos7

How to install redis on centos7

1. Install gcc dependencies. Since redis is developed in C language, you must first confirm whether the gcc environment (gcc-v) is installed before installation. If it is not installed, execute the following command to install it [root@localhostlocal]#yuminstall-ygcc 2. Download and Unzip the installation package [root@localhostlocal]#wgethttp://download.redis.io/releases/redis-5.0.3.tar.gz[root@localhostlocal]#tar-zxvfredis-5.0.3.tar.gz 3. cd Switch to redi

Jun 02, 2023 pm 05:20 PM
redis CentOS
What are the comprehensive knowledge points of Redis?

What are the comprehensive knowledge points of Redis?

Introduction to Redis Redis is completely open source and free, abides by the BSD protocol, and is a high-performance key-value database. Redis and other key-value cache products have the following three characteristics: Redis supports data persistence and can save data in memory in In the disk, it can be loaded again for use when restarting. Redis not only supports simple key-value type data, but also provides storage of data structures such as list, set, zset, hash, etc. Redis supports data backup, that is, data backup in master-slave mode. Redis advantages are extremely high performance – Redis read The speed is 1100

Jun 02, 2023 pm 05:14 PM
redis
What should I do if SpringBoot integrates redis and reports errors?

What should I do if SpringBoot integrates redis and reports errors?

Error 1 org.springframework.data.redis.connection.RedisConnectionFactory’thatcouldnotbefound Error 2 Errorcreatingbeanwithname’redisTemplate’definedinclasspathresource The reason is that I did not introduce the jedis dependency. Another reason is that the versions of maven dependencies between jedis and spring-boot-starter-data-redis are incompatible.

Jun 02, 2023 pm 05:13 PM
redis SpringBoot
How Redis implements order expiration deletion

How Redis implements order expiration deletion

Foreword: When design orders expire, you cannot rely solely on Redis. You need to implement the strategy code: importcom.coolplay.trade.dto.req.CancelOrderReq; importlombok.extern.slf4j.Slf4j; importorg.apache.commons.collections.CollectionUtils; importorg.springframework. data.redis.core.ZSetOperations;importorg.springframework.sch

Jun 02, 2023 pm 05:07 PM
redis
How Redis uses optimistic locking to ensure data consistency

How Redis uses optimistic locking to ensure data consistency

In Redis, there is often a situation where the value of a certain key is read, some business logic processing is performed, and then a new value is calculated based on the read value and set again. If client A has just read the key value, and then client B modifies the key value, then there will be a concurrency security issue. Problem simulation assumes that RedisServer has a key named test, which stores a json array [1,2,3]. Let us simulate the situation where client A and client B access modifications at the same time. The code is as follows: Client A: classRedisClientA(username:String,password

Jun 02, 2023 pm 04:52 PM
redis
What are the methods of using Redis cache in SpringBoot?

What are the methods of using Redis cache in SpringBoot?

1. Import the Redis dependency org.springframework.bootspring-boot-starter-data-redis 2. Configure redis accordingly in application.properties #redis configuration #Redis server address spring.redis.host=127.0.0.1#Redis server Connection port spring.redis.port=6379#Redis database index (default is 0) spring.redis.database=0#Maximum number of connections in the connection pool (use negative values ​​to indicate no limit) spr

Jun 02, 2023 pm 04:52 PM
redis SpringBoot
How to use lua for nginx redis access control

How to use lua for nginx redis access control

1. Requirements analysis\1. There are many ways for Nginx to handle access control, and there are many implementation effects, such as access IP segments, access content restrictions, access frequency restrictions, etc. \2. Using Nginx+Lua+Redis for access restriction is mainly to consider the need for fast access control in high concurrency environments. \3. The process of Nginx processing requests is divided into 11 stages, namely: post-read, server-rewrite, find-config, rewrite, post-rewrite, preaccess, access, post-access, try-files, content, log.in open

Jun 02, 2023 pm 04:31 PM
redis nginx lua
What is the default serialization method for modifying Springsession redis?

What is the default serialization method for modifying Springsession redis?

1. The key configurations for configuring Spring-session-redis are as follows: 2. View the RedisHttpSessionConfiguration source code as follows: @BeanpublicRedisTemplatesessionRedisTemplate(RedisConnectionFactoryconnectionFactory){RedisTemplatetemplate=newRedisTemplate();template.setKeySerializer(newStringRedisSerializer()

Jun 02, 2023 pm 03:58 PM
redis springsession
How to set redis to start automatically at boot under Linux

How to set redis to start automatically at boot under Linux

The specific method of setting up redis to start automatically on Linux 1. Set daemonize in redis.conf to yes to ensure that the daemon process is enabled. 2. Write the self-starting script vi/etc/init.d/redis. Look at the directory clearly. You are creating a new redis file under etc/init.d. Why? Because Linux will execute the file writing script in this directory when booting. I don’t know how to write the script. , but there are people on the Internet who know it, just bring it #chkconfig:23451090#description:StartandStopredisPATH=/usr/local/bin:/sbin:/usr/bin:/bin

Jun 02, 2023 pm 03:52 PM
Linux redis

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