该应用程序的多个实例可以使用并行作业管理器(PJM)来进行分派，其中各个分区处理不同的数据部分。
Multiple instances of that application can be dispatched using the Parallel Job Manager (PJM), where each partition processes a different section of the data.
在高并行批处理领域中，比较困难的问题是操作控制，以及管理许多并发执行的作业。
A difficult challenge in the area of highly-parallel batch processing is operational control and managing the many jobs that are executing concurrently.
MapReduce应用程序必须具备“映射”和“缩减”的性质，也就是说任务或作业可以分割为小片段以进行并行处理。
MapReduce applications must have the characteristic of "Map" and "Reduce," meaning that the task or job can be divided into smaller pieces to be processed in parallel.
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