current location：Home > Technical Articles > Database > Redis
- Direction：
- All web3.0 Backend Development Web Front-end Database Operation and Maintenance Development Tools PHP Framework Daily Programming WeChat Applet Common Problem Other Tech CMS Tutorial Java System Tutorial Computer Tutorials Hardware Tutorial Mobile Tutorial Software Tutorial Mobile Game Tutorial
- Classify：
-
- How to use redis delayed double delete strategy
- In the current environment, we usually prefer redis cache to reduce our database access pressure. However, we will also encounter the following situation: when a large number of users access our system, they will first query the cache. If there is no data in the cache, they will query the database, then update the data to the cache, and if the data in the database has changed It needs to be synchronized to redis. During the synchronization process, the data consistency between MySQL and redis needs to be ensured. It is normal for a short data delay to occur during this synchronization process, but in the end it is necessary to ensure the consistency between mysql and the cache. //We usually use redis logic //Usually we query reidsStringvalue=RedisUt first
- Redis 1796 2023-06-02 20:32:14
-
- How to solve the problem that springboot cannot connect to redis
- The first way is to check whether the firewall opens port 6379 and check the firewall status systemctlstatusfirewalld if the firewall is not started. You can choose to look directly at the latter two methods. Or just open the firewall, and then continue with the following steps: open the port firewall-cmd--zone-public--add-port=6379/tcp--permanent#Display success--permanent means it will take effect permanently. Without this parameter, it will be invalid after restarting and restart the firewall. firewall-cmd--reload#Display successView the open ports of the firewall fire
- Redis 1957 2023-06-02 20:31:06
-
- What is the method for using Redis in ThinkPHP framework in Pagoda?
- Redis is a commonly used non-relational database, mainly used for data caching. The data is saved in the form of key-value, and the key values map to each other. Its data storage is different from MySQL. Its data is stored in memory, so data reading is relatively fast, which is very good for high concurrency. Regarding the installation of redis, install the pagoda panel on the server or virtual machine to install redis, so that you can use redis very easily. Remember that when installing redis, you must not only install the redis software, but also enter the PHP version used by the project to install the redis extension. Then open the redis software 1. First, find redis in the installation panel of the pagoda and click Install. 2. Install redi
- Redis 1112 2023-06-02 20:31:01
-
- Python Redis data processing methods
- 1. Foreword Redis: RemoteDictionaryServer, that is, remote dictionary service. The bottom layer of Redis is written in C language. It is an open source, memory-based NoSql database. Because Redis performance far exceeds other databases, it also supports clustering, distribution, master-slave synchronization, etc. Advantages, so it is often used in scenarios such as caching data and high-speed reading and writing. 2. Preparation Let’s take the installation of Redis-Server on the cloud server Centos7.8 as an example. First, install the Redis database on the cloud server #Download epel warehouse yuminstallepel-release #Install redisyuminstallredis Then, via vim command
- Redis 1378 2023-06-02 20:19:25
-
- Redis usage example analysis
- The first part: Native jedis connects to redis. First of all, we need to understand that when we originally used mysql, we used jdbc to connect to the database. In the same way, if we connect to redis here, we must use jedis. The first step: Create a new java project, import the package to create a new java project, and import the package redis.clientsjedis3.3.0com.alibabafastjson1.2.73. Step 2: Open the redis service, write a method to open the redis service, create a new test class, and write a method publicclassPing{publicstaticvoidmain (String[]args){Jedi
- Redis 1148 2023-06-02 20:04:01
-
- What are the common commands for keys and strings in Redis?
- Redis related knowledge The default port number of Redis is 6379 and there are 16 databases by default. Similar to array subscripts starting from 0, the initial default is to use library No. 0. Use the command select to switch databases. Such as: select8. Unified password management, all libraries have the same password. dbsize checks the number of keys in the current database. flushdb clears the current library. flushall kills all libraries. Redis is a single-threaded + multi-channel IO multiplexing technology. Multiplexing refers to using a thread to check the readiness status of multiple file descriptors (Socket), such as calling the select and poll functions, passing in multiple file descriptors, and if one file descriptor is ready, return, otherwise blocked straight
- Redis 1012 2023-06-02 19:20:35
-
- 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
- Redis 4727 2023-06-02 19:10:21
-
- 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
- Redis 1375 2023-06-02 18:53:23
-
- 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
- Redis 1894 2023-06-02 18:25:31
-
- 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
- Redis 4182 2023-06-02 17:58:09
-
- 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
- Redis 1484 2023-06-02 17:25:24
-
- 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
- Redis 1884 2023-06-02 17:20:58
-
- 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
- Redis 1165 2023-06-02 17:14:25
-
- 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.
- Redis 1917 2023-06-02 17:13:04
-
- 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
- Redis 982 2023-06-02 17:07:04
Recommended Articles
Tool Recommendations
jQuery enterprise message form contact code
jQuery enterprise message form contact code is a simple and practical enterprise message form and contact us introduction page code.
form button
2024-02-29
HTML5 MP3 music box playback effects
HTML5 MP3 music box playback special effect is an mp3 music player based on HTML5 css3 to create cute music box emoticons and click the switch button.
Player special effects
2024-02-29
HTML5 cool particle animation navigation menu special effects
HTML5 cool particle animation navigation menu special effect is a special effect that changes color when the navigation menu is hovered by the mouse.
Menu navigation
2024-02-29
jQuery visual form drag and drop editing code
jQuery visual form drag and drop editing code is a visual form based on jQuery and bootstrap framework.
form button
2024-02-29
Organic fruit and vegetable supplier web template Bootstrap5
An organic fruit and vegetable supplier web template-Bootstrap5
Bootstrap template
2023-02-03
Bootstrap3 multifunctional data information background management responsive web page template-Novus
Bootstrap3 multifunctional data information background management responsive web page template-Novus
backend template
2023-02-02
Real estate resource service platform web page template Bootstrap5
Real estate resource service platform web page template Bootstrap5
Bootstrap template
2023-02-02
Simple resume information web template Bootstrap4
Simple resume information web template Bootstrap4
Bootstrap template
2023-02-02
Cute summer elements vector material (EPS PNG)
This is a cute summer element vector material, including the sun, sun hat, coconut tree, bikini, airplane, watermelon, ice cream, ice cream, cold drink, swimming ring, flip-flops, pineapple, conch, shell, starfish, crab, Lemons, sunscreen, sunglasses, etc., the materials are provided in EPS and PNG formats, including JPG previews.
PNG material
2024-05-09
Four red 2023 graduation badges vector material (AI EPS PNG)
This is a red 2023 graduation badge vector material, four in total, available in AI, EPS and PNG formats, including JPG preview.
PNG material
2024-02-29
Singing bird and cart filled with flowers design spring banner vector material (AI EPS)
This is a spring banner vector material designed with singing birds and a cart full of flowers. It is available in AI and EPS formats, including JPG preview.
banner picture
2024-02-29
Golden graduation cap vector material (EPS PNG)
This is a golden graduation cap vector material, available in EPS and PNG formats, including JPG preview.
PNG material
2024-02-27
Home Decor Cleaning and Repair Service Company Website Template
Home Decoration Cleaning and Maintenance Service Company Website Template is a website template download suitable for promotional websites that provide home decoration, cleaning, maintenance and other service organizations. Tip: This template calls the Google font library, and the page may open slowly.
Front-end template
2024-05-09
Fresh color personal resume guide page template
Fresh color matching personal job application resume guide page template is a personal job search resume work display guide page web template download suitable for fresh color matching style. Tip: This template calls the Google font library, and the page may open slowly.
Front-end template
2024-02-29
Designer Creative Job Resume Web Template
Designer Creative Job Resume Web Template is a downloadable web template for personal job resume display suitable for various designer positions. Tip: This template calls the Google font library, and the page may open slowly.
Front-end template
2024-02-28
Modern engineering construction company website template
The modern engineering and construction company website template is a downloadable website template suitable for promotion of the engineering and construction service industry. Tip: This template calls the Google font library, and the page may open slowly.
Front-end template
2024-02-28
