X2Go

Introduction

When using interactive GUI applications via SSH with X11 forwarding, input delays resulting from network latency are often an issue. For the initial connection from your machine to the HPC frontends, X2Go - everywhere@home is a possible alternative to remedy this situation, since it uses the NoMachine NX technology.

Setup

We first describe how to set up X2Go on your system and afterwards how to prepare your login session for using the batch system.

X2Go client

The first step is to visit Installing the Qt-based X2Go Client and download the appropriate client for your platform (Win/Mac/Linux)

When setting up a session to one of the frontends gwdu101, gwdu102 or gwdu103, be sure to to put the complete domain name into the field Host and your user name into Login. Specifying a key is optional, just like for regular SSH sessions.

Because the default use case for X2Go is to start a desktop environment, which is not installed on the HPC frontends, change the Session type to Single application and type xterm as the run command.

xterm environment

In order to ensure the correct shell environment for the batch system, enter the following in the xterm session

source /etc/profile.d/lsf.sh

To make the setting permanent, just add this line it to the file ~/.bashrc.

You can now continue by submitting an interactive job with X-Forwarding from the frontend to the compute nodes as usual.

The X2Go server is installed on the HPC frontends but not on the login server login.gwdg.de. If you're not connecting from within GöNET, please establish a VPN connection first.

ckoehle2 2018/08/23 16:52

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