This is required only for remote execution.
只有远程执行才需要它。
For remote execution, you will need minimum two machines.
对于远程执行，您最少需要两台机器。
Process migration also eases execution because we don't need explicit remote execution.
进程迁移也方便了执行，因为我们不需要进行显式的远程执行。
However, the overlap in remote execution time is enough to bring about significant improvement: the query runs in 432 seconds without asynchrony and 327 seconds with asynchrony, an improvement of 24%.
然而，远程执行时间上的重叠足以带来显著的性能提升：在没有异步的情况下，查询要运行432秒，而在有异步的情况下查询只需运行327秒，性能提高了24%。
Remote execution of scripts on multiple client machines.
多客户端上脚本的远程执行。
Remote execution also emulates the standard input, output, and error of the client host.
远程执行还模拟客户端主机的标准输入、输出和错误。
Remote execution also emulates the standard input, output, and error of the client host.
远程执行还模拟客户端主机的标准输入、输出和错误。
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