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 :doc:`command line interface `, or automatically using either the :class:`dask.distributed.SSHCluster` Python *cluster manager* or the ``dask-ssh`` command line tool. This document describes both of these options. .. note:: Before instaniating a ``SSHCluster`` it is recommended to configure keyless SSH for your local machine and other machines. For example, on a Mac to SSH into localhost (local machine) you need to ensure the Remote Login option is set in System Preferences -> Sharing. In addition, ``id_rsa.pub`` should be in ``authorized_keys`` for keyless login. Python Interface ---------------- .. currentmodule:: dask.distributed .. autofunction:: 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 .. note:: The command line documentation here may differ depending on your installed version. We recommend referring to the output of ``dask-ssh --help``. .. click:: distributed.cli.dask_ssh:main :prog: dask-ssh :show-nested: