一种多服务端HTML5 Web Worker迁移系统设计与实现

DESIGN AND IMPLEMENTATION OF A MULTI-SERVER HTML5WEB WORKER OFFLOADING SYSTEM

计算迁移是解决智能终端资源不足带来的应用性能问题的方法之一。它通过将应用中计算密集型任务迁移到服务端运行来提高应用性能。Web Worker是HTML5标准引入的多线程机制,其面向计算以及相对独立特性使其成为计算迁移重点研究对象。现有Web Worker迁移都是将Web Worker迁移到单种服务端,无法充分利用多种服务端的资源优势。针对Web应用中Web Worker设计一种多服务端Web Worker迁移系统。该系统基于HTML5 Websocket通信机制对标准Web Worker接口进行自定义实现,将Web Worker迁移到单个服务器和由周围终端设备组成的Docker Swarm集群两种服务端。实验结果表明,该Web Worker迁移系统可以充分利用多种服务端资源,有效提升智能终端Web应用性能。

Computation offloading is one of the effective caused by insufficient resources of intelligent terminals. approaches to solve the problem of application performance It improves the application performance by offloading computation-intensive tasks to a powerful server side. Web Worker is a multi-thread mechanism introduced by HTML5 standard. Web Worker is oriented to computing task and relative independent, so it becomes a key research object in computing offloading. All the existing Web Worker offloading methods offload Web Worker to a single kind of server side. It fails to make the best of resources of multi-kind of servers. Hence, we designed a multi-server Web Worker offloading system. By rewriting the standard Web Worker interfaces based on HTML5 WebSocket communication mechanism, we offloaded Web Worker to single server and Docker Swarm cluster composed of smwounding terminal devices. Experiment is conducted and the results show that the implemented multi-server Web Worker offloading system can fully exploit the resources of multi-server side and effectively improve the performance of web application.