您需要知道拷贝哪一个JAR文件，以及要做哪些设置。
You need to know which JAR files to copy, and what Settings to make.
请考虑在网络设置正确之后立即对生效的交换机配置做一个备份拷贝。
Consider making a backup copy of your running switch configuration once you have the network setup correctly.
现在并不能方便地将文件拷贝到每个节点上、在每个要添加的节点上设置ssh和MPI以及在将节点移出集群时进行适当的修改，等等。
It is not convenient to copy files to every node, set up SSH and MPI on every node that gets added, make appropriate changes when a node is removed, and so on.
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