In this ha design , the psf module is divided into three sub - modules including the core control sub - module , the state update sub - module and the system agent sub - module . then all the interface functions are well defined and the critical data structure is given . finally the flow of related state information update procedure is designed and all the function primitives are defined and implemented 在本文提供的ha方案中,將psf模塊劃分核心控制,狀態刷新,系統代理等子模塊,并定義了清晰的函數接口和關鍵的數據結構,設計了相關的信息刷新流程,完成了所有函數原語的分解與實現。