Open OnDemand (Beta)¶

Open OnDemand provides a simple Web portal for launching various jobs and applications on the ZIH systems.

Disclaimer¶

Warning

The Open OnDemand service is provided as-is, use at your own discretion. It is currently in a testing stage.

Access¶

Note

This service is only available for users with an active HPC project. See Application for Login and Resources, if you need to apply for an HPC project.

Open OnDemand is available at https://ood.hpc.tu-dresden.de.

At login page please use your ZIH credentials (your username, without @tu-dresden.de, and your password).

On logging into OOD, you will see the dashboard, which displays a selected menu of apps and any interactive sessions that are currently running. In the top navigation bar, you have several links and sub-menus.

The Files link will give you a Web listing of your home directory. From here you can navigate to other directories, create new directories, open a terminal or edit files in the browser.

Note

Your filesystem access and permissions will be exactly as on a login node. A subdirectory ~/ondemand will be created in your home directory to contain files related to your jobs. Files created this way will count toward your user quota.

The Shell Access menu lets you launch terminals directly on the login nodes of the different clusters.

The Active Jobs link will show you a table of all your active Slurm jobs.

The Interactive Apps menu will let you select interactive applications to launch on the cluster. Selecting an application here (or using the large icons on the dashboard) will bring you to a form where you can specify the job parameters. When the job is submitted, it will be enqueued using Slurm, if the parameters are valid, and run as a batch script.

Many of the jobs we offer are meant for live interaction via the Web. Their front ends can be reached through Open OnDemand by following the My Interactive Sessions link.

My Interactive Sessions¶

Here you will find a backlog of current and recent jobs, each detailed by a card showing certain key information. Running jobs will appear as green cards. If they can be reached by the Web, they will present a button allowing you to connect. VNC connections may present additional controls for compression and image quality.

The Web file browser can be pointed at the directory associated with any job by following the Session ID link. The files for a completed job can be downloaded as a zip using the blue button, and a support ticket can be drafted using the yellow button. Please follow the usual guidelines when filling out your ticket.

Job Options¶

The job options on any Open OnDemand application form are passed to Slurm. GPU options will be present for systems which support GPU jobs. You can save your settings as a personal preset using the button at the bottom of the form. Your saved settings will appear in the sidebar menu under My Interactive Sessions and Interactive Apps.

Standard Profiles¶

We offer simple preset profiles for our major applications. Typical values are given below, but values may differ for some applications.

Cluster	Normal	Large	Extra Large	Max. Runtime
`alpha`	6 CPU 61,872 MB 1 GPU	24 CPU 247,488 MB 4 GPU	48 CPU 494,976 MB 8 GPU	7 d
`alpha-i`	1 CPU 10,312 MB 1 GPU	-	-	12 h
`barnard`	1 CPU 2,403 MB	52 CPU 124,956 MB	104 CPU 249,912 MB	7 d
`capella`	14 CPU 188,118 MB 1 GPU	28 CPU 376,236 MB 2 GPU	56 CPU 752,472 MB 4 GPU	7 d
`capella-i`	1 CPU 14,141 MB 1 GPU	-	-	12 h
`julia`	1 CPU 54,425 MB	4 CPU 217,700 MB	8 CPU 435,400 MB	7 d
`romeo`	1 CPU 1,972 MB	64 CPU 126,208 MB	128 CPU 252,416 MB	7 d
`vis`	1 CPU 4,759 MB	4 CPU 19,036 MB	8 CPU 38 072,MB	12 h

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