然后，分析这两种并行执行方式在实现多范式并行语言时所存在的问题。

Then, it analyzes their disadvantages when implementing parallel language with multi paradigm.

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本文首先介绍两种典型的并行执行方式：支持数据并行语言的SPMD方式和支持任务并行语言的MPMD方式。

Firstly, this paper introduces two existed parallel execution models: SPMD and MPMD supporting data parallel and task parallel languages, respectively.

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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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