Table of Contents
回复内容:
Home Backend Development PHP Tutorial Redis 多进程Uncaught exception 'RedisException' with message

Redis 多进程Uncaught exception 'RedisException' with message

Jun 06, 2016 pm 08:10 PM
php redis swoole

1.背景描述:用Swoole作为TcpServer,配置了worker_num = 8 ,task_worker_num =8 .也就是会有16个进程。 创建了一个redid连接,在 onTask(8个task,每个task都会回调onTask方法)方法中读取redis保存的值。

2.问题描述:现在发现会报错Uncaught exception 'RedisException' with message 'read error on connection' 。初步判定是多个进程调用redid导致的,我只用一个task,是没有问题的。
看到swoole的文档:
Redis 多进程Uncaught exception 'RedisException' with message
需要在onWorkerStart中建立redis连接,那么有work 、task 各8个,如果这样的话就会有16个redis连接(task、work启动时都会调用onWorkerStart函数)。

1)需要建立16个redis连接,我这样理解对吗?该如何改进呢?
2)每个redis连接我都要保存吗?这样岂不是用起来有点麻烦。
3)如果我以后work、task的数值增加,岂不会有更多的redis连接,我该怎么办呢?
4)是不是我使用方式有问题,那么我该怎么使用呢?

回复内容:

1.背景描述:用Swoole作为TcpServer,配置了worker_num = 8 ,task_worker_num =8 .也就是会有16个进程。 创建了一个redid连接,在 onTask(8个task,每个task都会回调onTask方法)方法中读取redis保存的值。

2.问题描述:现在发现会报错Uncaught exception 'RedisException' with message 'read error on connection' 。初步判定是多个进程调用redid导致的,我只用一个task,是没有问题的。
看到swoole的文档:
Redis 多进程Uncaught exception 'RedisException' with message
需要在onWorkerStart中建立redis连接,那么有work 、task 各8个,如果这样的话就会有16个redis连接(task、work启动时都会调用onWorkerStart函数)。

1)需要建立16个redis连接,我这样理解对吗?该如何改进呢?
2)每个redis连接我都要保存吗?这样岂不是用起来有点麻烦。
3)如果我以后work、task的数值增加,岂不会有更多的redis连接,我该怎么办呢?
4)是不是我使用方式有问题,那么我该怎么使用呢?

对,每个进程都要创建一个连接。如果启动了200个进程就一定需要200个连接。你的使用方式没错。

这样使用确实会创建16个连接。
不想保存连接的话,可以在用到redis时再创建连接,用pconnect方式。
由于不同进程的redis连接不能共享,随着进程数增加是会有更多的redis

可以在worker进程中写主要逻辑。涉及redis操作的部分封装成任务,由task进程执行。在启动task时,使用taskwait方法,等待任务的返回。这样相当于把task进程当成了连接池。

如果还有其他的慢速任务需要用task异步处理,则可以在启动task时,传入指定workerid,这样其实就是把task进程区分功能,有的负责redis数据处理,有的负责慢速任务。

1: redis和mysql机制不一样, 不怕连接多。
2: 没必要用pconnect, swoole本身是长驻内存的,connect之后,除非是worker重启了,连接才失效。
3: read error on connection, 只能你复用了同一个连接,但这个连接可能在其他的进程是被close了。

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Roblox: Bubble Gum Simulator Infinity - How To Get And Use Royal Keys
3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
Nordhold: Fusion System, Explained
3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
Mandragora: Whispers Of The Witch Tree - How To Unlock The Grappling Hook
3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

Hot Topics

Java Tutorial
1665
14
PHP Tutorial
1269
29
C# Tutorial
1249
24
PHP and Python: Different Paradigms Explained PHP and Python: Different Paradigms Explained Apr 18, 2025 am 12:26 AM

PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.

The Continued Use of PHP: Reasons for Its Endurance The Continued Use of PHP: Reasons for Its Endurance Apr 19, 2025 am 12:23 AM

What’s still popular is the ease of use, flexibility and a strong ecosystem. 1) Ease of use and simple syntax make it the first choice for beginners. 2) Closely integrated with web development, excellent interaction with HTTP requests and database. 3) The huge ecosystem provides a wealth of tools and libraries. 4) Active community and open source nature adapts them to new needs and technology trends.

How to use the Redis cache solution to efficiently realize the requirements of product ranking list? How to use the Redis cache solution to efficiently realize the requirements of product ranking list? Apr 19, 2025 pm 11:36 PM

How does the Redis caching solution realize the requirements of product ranking list? During the development process, we often need to deal with the requirements of rankings, such as displaying a...

Laravel8 optimization points Laravel8 optimization points Apr 18, 2025 pm 12:24 PM

Laravel 8 provides the following options for performance optimization: Cache configuration: Use Redis to cache drivers, cache facades, cache views, and page snippets. Database optimization: establish indexing, use query scope, and use Eloquent relationships. JavaScript and CSS optimization: Use version control, merge and shrink assets, use CDN. Code optimization: Use Composer installation package, use Laravel helper functions, and follow PSR standards. Monitoring and analysis: Use Laravel Scout, use Telescope, monitor application metrics.

Redis's Role: Exploring the Data Storage and Management Capabilities Redis's Role: Exploring the Data Storage and Management Capabilities Apr 22, 2025 am 12:10 AM

Redis plays a key role in data storage and management, and has become the core of modern applications through its multiple data structures and persistence mechanisms. 1) Redis supports data structures such as strings, lists, collections, ordered collections and hash tables, and is suitable for cache and complex business logic. 2) Through two persistence methods, RDB and AOF, Redis ensures reliable storage and rapid recovery of data.

What should I do if the Redis cache of OAuth2Authorization object fails in Spring Boot? What should I do if the Redis cache of OAuth2Authorization object fails in Spring Boot? Apr 19, 2025 pm 08:03 PM

In SpringBoot, use Redis to cache OAuth2Authorization object. In SpringBoot application, use SpringSecurityOAuth2AuthorizationServer...

The Compatibility of IIS and PHP: A Deep Dive The Compatibility of IIS and PHP: A Deep Dive Apr 22, 2025 am 12:01 AM

IIS and PHP are compatible and are implemented through FastCGI. 1.IIS forwards the .php file request to the FastCGI module through the configuration file. 2. The FastCGI module starts the PHP process to process requests to improve performance and stability. 3. In actual applications, you need to pay attention to configuration details, error debugging and performance optimization.

Title: How to use Composer to solve distributed locking problems Title: How to use Composer to solve distributed locking problems Apr 18, 2025 am 08:39 AM

Summary Description: Distributed locking is a key tool for ensuring data consistency when developing high concurrency applications. This article will start from a practical case and introduce in detail how to use Composer to install and use the dino-ma/distributed-lock library to solve the distributed lock problem and ensure the security and efficiency of the system.

See all articles