这意味着必须随需增加以occi管理的、附有Hadoop任务跟踪器和数据节点的虚拟机。
This means that OCCI-managed virtual machines with Hadoop's Task Trackers and Data Nodes must be added on-demand.
在map任务完成时(如通过任务跟踪器在Hadoop中所定义的)，提供工作给reduce工作线程。
When the map tasks are complete (as defined in Hadoop by the task tracker), the work is provided to the reduce worker.
整个资源管理系统由网格用户、任务管理中心、资源管理中心、资源跟踪器等组成。
The whole resource management system consists of several parts such as grid user, assignment manager, resource manager, and resource tracing.
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