在本地运行Hydra(mpiexec)会产生奇怪的SSH错误 [英] Run Hydra (mpiexec) locally gives strange SSH error

问题描述

我正在尝试从以下问题运行示例代码: MPI基本示例不起作用，但是当我这样做时:

I am trying to run example code from this question: MPI basic example doesn't work but when I do:

$ mpirun -np 2 mpi_test

我明白了:

ssh: Could not resolve hostname wvxvw-laptop: Name or service not known

然后程序挂起，直到被中断.

And then the program hangs until interrupted.

wvxvw-laptop是我的笔记本电脑的主机名"，实际上就是一台笔记本电脑...

wvxvw-laptop is the "host name" of my laptop, which is just that, really, a laptopt...

我只想尝试运行示例代码，而不是设置网络集群或类似的东西.

All I want is to try to run the example code, not to set up a network cluster or anything like that.

我想念什么?我正在阅读Wiki页面 http://wiki.mpich.org/mpich/index .php/Using_the_Hydra_Process_Manager ，但我不明白是什么原因.

What did I miss? I'm reading the wiki page http://wiki.mpich.org/mpich/index.php/Using_the_Hydra_Process_Manager but I can't understand what is the reason.

对不起，我对此很陌生.

Sorry, I'm very new to this.

更多详细输出:

/usr/bin/ssh -x wvxvw-laptop "/usr/lib64/mpich/bin/hydra_pmi_proxy" \
--control-port wvxvw-laptop:54320 --debug --rmk user --launcher ssh \
--demux poll --pgid 0 --retries 10 --usize -2 --proxy-id 0 

经过格式化以提高可读性.我不太确定为什么这应该行得通(我从未用过ssh -x不确定应该做什么:/

Formatted for readability. I'm not quite sure why is this even supposed to work (I've never used ssh -x not sure what it is supposed to do :/

推荐答案

mpirun在mpi群集上注册的所有节点上执行程序. MPI使用计算机名称，因此您可以编辑/etc/hosts以添加wvxvw-laptop条目

mpirun execute your program on all node registered on your mpi cluster. MPI use the computer name so you can edit your /etc/hosts to add an entry for wvxvw-laptop

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