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SSH

It is easy to set up Dask on informally managed networks of machines using SSH. This can be done manually using SSH and the Dask command line interface <cli>, or automatically using either the SSHCluster Python command or the dask-ssh command line tool. This document describes both of these options.

Python Interface

distributed.deploy.ssh

SSHCluster

Command Line

The convenience script dask-ssh opens several SSH connections to your target computers and initializes the network accordingly. You can give it a list of hostnames or IP addresses:

$ dask-ssh 192.168.0.1 192.168.0.2 192.168.0.3 192.168.0.4

Or you can use normal UNIX grouping:

$ dask-ssh 192.168.0.{1,2,3,4}

Or you can specify a hostfile that includes a list of hosts:

$ cat hostfile.txt
192.168.0.1
192.168.0.2
192.168.0.3
192.168.0.4

$ dask-ssh --hostfile hostfile.txt

The dask-ssh utility depends on the paramiko:

python -m pip install paramiko

Note

The command line documentation here may differ depending on your installed version. We recommend referring to the output of dask-ssh --help.

distributed.cli.dask_ssh:main