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This article mainly explains the "MPI multi-node building", the content of the article is simple and clear, easy to learn and understand, now please follow the editor's ideas slowly in depth, together to study and learn "MPI multi-node building" bar!

Accounts with the same account password on multiple hosts

Communication establishment:

Sudo permission modification / etc/hosts

Add all child nodes

For example, 192.168.0.106 node1

192.168.0.107 node2

Turn off the firewall:

Sudo systemctl stop firewalld

Sudo systemctl disable firewalld

Enter ~ / .ssh

If not, link yourself first: ssh localhost

After entering

Enter ssh-keygen-t rsa to generate the public key

Load the generated id_rsa.pub into authorized__key to store the public keys of all nodes

Cat id_rsa.pub > > authorized_key

The rest of the node becomes the public key and then passes it to the master node.

Scp id_rsa.pub node1:~/.ssh/node2.pub prevents duplicate names, and the name of the file on the primary node is node2.pub

Put it under authorized_key:

Cat node2.pub > > authorized_key

Install MPI:

Go to the official website to download MPICH

Decompress tar zxvf filename.tar.gz

Enter cd filename

Installation trilogy:

. / configure-prefix=/usr/local/mpi/ # installs the required compilers in advance: compilers for gcc-c++ and fortran

Make

Sudo make install

Add to the user's environment variable:

Nano / .bashrc

Add the following two lines:

PATH=$PATH:/usr/local/mpi/bin

Export PATH

Save

After coming out, source ~ / .bashrc makes the changes effective.

Both mpicc and mpiexec can be used.

MPI multi-node operation:

Create a servers file

$nano servers

Node1:3#node1 executes three processes

Node2:3#node2 executes three processes

Node3:3#node3 executes three processes

Save

Put the compiled executable file in the same directory of the child node

Execute mpiexec-n 9-f. / servers. / a.out

Complete multi-node operation

Thank you for reading, the above is the content of "MPI multi-node building". After the study of this article, I believe you have a deeper understanding of the problem of MPI multi-node building, and the specific use needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!

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