Abstract: A scheme of energy-efficient policies for cluster-based embedded Web server is presented. It is implemented in embedded cluster platform with Linux. The energy-efficient policies of front end and back end in cluster platform are discussed. It designs a dynamic load estimating algorithm, and assigns a threshold mechanism in on/off algorithm in order to manage back end efficiently. It uses DVS policy in back end in order to select frequency appropriately when load changing. Simulation results show that compared with standard Linux kernel and other energy-efficient policies, this scheme has much better performance in terms of energy consumption saving.

Key words: cluster-based embedded Web server, dynamic load, threshold mechanism, dynamic voltage scaling

摘要： 提出一种针对嵌入式Web集群服务器的能耗节约机制，将其应用于基于Linux的嵌入式Web集群平台。分别探讨了集群平台的前端和后端服务器的节能方案：通过动态负载估算，在前端设计了控制后端服务器的开关算法，并在该算法中实现了阈值机制；后端服务器使用DVS策略，使之可根据负载情况动态调整处理器的工作频率。实验结果表明，和标准的Linux内核以及已有的节能方案相比，该方案节能效果显著。

关键词: 嵌入式Web集群服务器, 动态负载, 阈值机制, 动态电压调整

CLC Number: 

• TP393