Apache服务器进程迁移中文件状态恢复的研究

Restoration of opened files' state in process migration of Apache server

在基于Linux检查点机制的Apache服务器进程迁移过程中,实现了打开文件状态的一致性恢复。简要阐述了Apache服务器的体系结构及其在集群系统内的进程迁移实现技术。分析了目的结点上迁移进程恢复运行后打开文件状态不一致的原因,进行了相应的理论研究。最后给出了Apache服务器进程迁移过程中文件状态一致性恢复的具体实现。

In the process migration of Apache server based on the checkpoint mechanism of Linux, the restoration of opened files＇ state to consistency is implemented, Firstly, the architecture of Apache server and the technique of its process migration in Cluster are expounded, and the reason of the inconsistency of opened files＇ state in Apache server process is analyzed. As the result of theory research, an implement of restoration for the opened files＇ state in process migration of Apache server is presented.