The central cluster now offers the NSF supported Open OnDemand service portal, offering a fully HTML5 compliant job management portal requiring minimal knowledge of linux HPC environments and no end-user installation requirements other than a modern up-to-date web browser.
- Graphical file management - Upload, download, move and delete files and folders through the web browser.
- File editor - Edit and save files without the need to launch a shell session.
- Shell Access - Pop into a command line shell straight from the web portal.
- Queue Management - View up to date details of pending or running running on the cluster.
- Job submission templates - Submit jobs from the web console using preset templates or customize your own. (Includes capability to edit job scripts and parameters on the fly).
- Full linux desktop streaming via web - Run a full low latency XFCE linux desktop on the compute nodes for GUI heavy jobs such as Matlab, Mathematica etc. Graphical jobs continue to run while disconnected from compute host.
- No need to install a local xserver in order to run graphical jobs as all rendering is performed on the compute nodes.
Logging into the central HPC web portal.
- Point your browser to https://ondemand.hpc.caltech.edu/
- Login with your Caltech username/password and multi-factor authentication device.
Launching interactive Desktop job on a compute nodes.
- Click 'Interactive Apps > Central Desktop' on the menu bar
- Choose number of hours you require desktop. (default 1 hour, maximum 7 days)
- Choose number of cores you require. (default is 4 cores)
- Select email notification if you'd like to know via email when the desktop begins to run.
File Management and Transfer
Desktop fails to load with various DBUS error messages.
File upload in Open Ondemand file app stalls or produces an error.
- First, check your quota on the cluster. Attempting to upload to to the cluster while exceeding your quota will result in failure.
- Log out completely from the open ondemand console and close your browser.
- Log back into OOD console
- Click "Help" followed by "Restart web server"
- Navigate to the files app and attempt the upload again. Does it work?
- If no, attempt upload to your base home directory ~/. Does that work?
- If no, attempt to upload with another browser (i.e. chrome,firefox,safari) to verify if it's a browser cache issue. Note that Chrome is our recommended browser for OOD.