很多车联网项目中都用到了流处理框架，当生产者在推送消息到代理服务器上时，由于数据吞吐量的问题，可能会使服务器宕机，需要重启系统以恢复到宕机前的状态，但这时可能会丢失部分数据，针对这个问题，可以通过关键任务热备份来帮助记录读、写状态，更能保证数据的一致性，提升系统容错性能。

Stream processing frameworks are used in many Internet of Vehicles projects. When the producer pushes messages to the proxy server, due to data throughput problems, the server may be down, and the system needs to be restarted to restore to the state before the downtime. However, some data may be lost at this time. In response to this problem, key task hot backups can be used to help record the read and write status, which can better ensure data consistency, and improve system fault tolerance.