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brief introduction pyspider is a powerful Web crawler framework in Python, and supports distributed architecture. Why use docker to build pyspider When installing pyspider, you have crawled through some pits. For example, when using pip install pyspider, the version of Python is required to be 3.6 or less, because async is already the keyword ...

http://120.79.167.88:4444/articles/2019/05/12/1557661499842.html Record the difference between Redis cache and spring cache 1.Redis is a third-party cache, so the cache data still exists after the project is restarted 2. Spring cache is built on the JVM for caching, so the cache will disappear automatically after the project i ...

Laravel combines swoole to implement a function that actively triggers message pushing, which allows you to send custom messages to all members of the template message, instead of sending messages through the client, and listens to the messages sent in the message on the service side for business logic. Active Message Push ImplementationNormall ...

Shiro redis is an open-source plug-in of Daniel on the Internet (github address: https://github.com/alexxiyang/shiro-redis )Recently, the following errors are always reported when using it (version 3.1.0): We need a field to identify this Cache Object in Redis. So you need to defined an id field which you can get unique id to id ...

Official website: https://redis.io Download: https://redis.io/download 1. Installation dependency ➜ yum install -y gcc gcc-c++ kernel-devel 2. Download the source package # It is recommended to store the source code of each software in this directory ➜ cd /usr/local/src # Download the specified version ➜ wget http://download.redis.io/rele ...

Connection failureExampleAmong them, the common errors reported by Redis are: Configuration item: timeoutError while reading line from the serverRedis can configure that if the client does not send data to the redis server after several seconds, the connection will be close d. Common MySQL errors: Configuration item: wait & Interactive time ...

Add redis cache to the project 1.composer installs redis composer require "yiisoft/yii2-redis" 2. Settings in the project configuration file: import cache and link redis server common/config/main.php: 'components' => [ 'cache' => [ // 'class' => 'yii\caching\FileCache', ...

Preface Recently, we are working on a smart home platform. Considering that the control of home needs fast response, we plan to use redis cache. On the one hand, it can reduce the pressure of database, on the other hand, it can improve the response speed. The technology stack used in the project is basically the familiar springboot family buck ...

Preamble to Night Light:       A little more persistence, a little more effort, and what seemed hopeless failure may turn to glorious success A little more perseverance and a little more effort will turn a seemingly hopeless failure into a brilliant success.                   Text:   Communication between dispat ...

Content of this article Using Redis to optimize interface performance in high concurrency scenarios Database optimistic lock With the approaching of the double 11, all kinds of promotional activities began to become popular, and the mainstream ones are seckill, coupons, and so on. The main scenarios involving high concurrency competing for th ...