输入数据使用这样一种方法进行分区，即在并行处理的计算机集群中分区的方法。
Input data is partitioned in such a way that it can be distributed among a cluster of machines for processing in parallel.
并行循环(Parallel Loops)——在需要对多个相似数据输入执行同样操作的时候使用。
Parallel Loops - Used when one needs to apply the same operation to multiple similar data inputs.
通过编辑文件，删除不需要的表并把它分割为几个输入文件，这样就可以采用分阶段转移方式，也就是并行地执行从源数据库卸载和装载到目标数据库。
Edit the file to remove unwanted tables and split it into several input files to do a staggered movement approach where you perform unload from source and load to target in parallel.
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