利用Redis简化延迟任务处理（使用redis做延迟处理）

Delay tasks have become increasingly important for distributed system, such as order expiration, timed task, etc. Traditional solutions using cron solutions can achieve scheduling, but it has certn limitations, such as the lack of flexibility, the non-real-time experience, and the lack of scalability. Fortunately, with the emergence of Redis technology, We can use Redis to easily implement delayed job processing.

宝山网站制作公司哪家好，找成都创新互联！从网页设计、网站建设、微信开发、APP开发、自适应网站建设等网站项目制作，到程序开发，运营维护。成都创新互联成立与2013年到现在10年的时间，我们拥有了丰富的建站经验和运维经验，来保证我们的工作的顺利进行。专注于网站建设就选成都创新互联。

Redis is an open source, high performance distributed memory database, which can store k-v structures, and support data persistence (with AOF and RDB). Therefore, we can use Redis as a message queue to delay tasks.

The principle of Redis delaying task is to save tasks in Redis database with a specific score, and expiration time. When the score expired, Redis will return all tasks with expired scores, and then our job can be executed.

The specific solutions are as follows:

1. Add a delayed task list:

“`py

conn.zadd(REDIS_KEY, {COMMAND_NAME + ‘_’ + NOW_TIME: NOW_TIME}

2. Set up a scheduled task of 1 minute to get the task that has expired:

```py
def get_expired_task():
    valid_time = time.time()
    expired_task = conn.zrangebyscore(REDIS_KEY, 0, valid_time)
    for item in expired_task:
        job_name = item.rsplit('_', 1)[0]
        # Execute the job here
        conn.zrem(REDIS_KEY, item)

3. Add corresponding scheduled task to cron according to the granularity of the task:

“`sh

* * * * * python get_expired_task.py

Redis is not only efficient and flexible, but also supports distributed clustering, which is suitable for large scale delayed tasks. With the support of cron tasks and python access Redis, we can easily implement timed task scheduling and delay job processing.

香港云服务器机房,创新互联（www.cdcxhl.com）专业云服务器厂商,回大陆优化带宽,安全/稳定/低延迟.创新互联助力企业出海业务,提供一站式解决方案。香港服务器-免备案低延迟-双向CN2+BGP极速互访！

文章名称：利用Redis简化延迟任务处理（使用redis做延迟处理）
网页地址：http://www.hantingmc.com/qtweb/news4/537304.html

网站建设、网络推广公司-创新互联，是专注品牌与效果的网站制作，网络营销seo公司；服务项目有等

广告

声明：本网站发布的内容（图片、视频和文字）以用户投稿、用户转载内容为主，如果涉及侵权请尽快告知，我们将会在第一时间删除。文章观点不代表本网站立场，如需处理请联系客服。电话：028-86922220；邮箱：631063699@qq.com。内容未经允许不得转载，或转载时需注明来源： 创新互联