Developed a distributed coordination mechanism for scheduled tasks in the hectorqin/hyperf repository, focusing on backend reliability and scalability. The work centered on implementing a Redis-based mutex to manage crontab task execution across multiple nodes, ensuring that each scheduled job runs only once per interval and eliminating race conditions in clustered environments. By introducing the Hyperf\Crontab\Mutex\RedisServerMutexByNodeName class, the solution leveraged PHP and Redis to provide a robust locking primitive with minimal overhead. This approach enabled safe horizontal scaling of cron workloads, improving the consistency and reliability of scheduled operations in multi-node PHP backend deployments.