# Distributed Configuration

From within the Project Editor, select the Distributed Tools menu, then click on Distributed Configuration. This will open the Distributed Configuration window.

In this window, you are able to select your hostfile, containing the remote nodes you wish to use, as well as edit the hostfile. The lower text box, used for editing the host file, will not be enabled until a hostfile is selected.
To select the hostfile, click on the browse button at the top. This will open a file browser where you can navigate to the desired hostfile. Please note that the seleted hostfile must match the default hostfile specified in the mca-params.conf file created during installation.
Once you select your hostfile, its path will be loaded into the text box at the top, and its contents will be loaded into the text box at the bottom. DESpot will remember your selected hostfile between sessions, so you will not need to re-select it each time you run DESpot. It is assumed that the hostfile will always contain localhost as the first line (corresponding to the host used for the master process), and so this line will not be displayed in the lower text box. Your window will look something like this

You are now able to edit the contents of the specified hostfile. You must enter each remote node you wish to use on a separate line. If you wish to have multiple slave processes started on the same node, simply add that node on multiple lines as demonstrated in the image above.
To save your changes, click Ok. Please note that you must restart DESpot after making any changes to your hostfile.

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