Navigation and service

HDF Cloud


Starting early 2019, JSC offers a Cloud computing platform for users with a demand for more complex use cases, such as services based on data residing in the HPC file systems. The resources have been procured as part of the Helmholtz Data Federation (HDF) activities, thus the name HDF Cloud.

The HDF Cloud at JSC comprises OpenStack compute, network, and volume services as well as an integration with the DATA file system also available on the HPC systems.

Mailing list

Please subscribe to the HDF Cloud mailing list by sending an email to This is a low traffic list for important updates and announcements regarding the cloud resources.


Should you need support with any of the offerings or have questions, please contact the data services support team at

We are available during normal business hours: Monday through Friday 8:00 am – 5:00 pm CET with the exception of German national and regional (NRW) holidays. We are also unavailable between Christmas and January 1st.


2020-10-01 (update): There will be a scheduled maintenance including downtime during the morning of 2020-10-08. We plan to fix the remaining storage problems at this occasion.

2020-09-15 (update): the storage backend has not caused problems during the past three months. However, we are aware that in case of hardware failures we may see I/O errors in the cloud VMs again. We are looking into the situation together with the storage vendor. Another maintenance slot may have to be scheduled to fully resolve the issues.

2020-06-10: we have recently been experiencing problems with the backend storage that hosts the VM instance images and volumes. Expect degraded service while we are investigating and trying to fix these. We may shutdown and restart VMs without additional prior notice. The OpenStack API and dashboard are currently available to users, but may be disabled during maintenance.

Service / ComponentStatus
OpenStack APIDEGRADED (2020-06-10)
VMsDEGRADED (2020-06-10)
Access to $DATAOK (2020-06-10)


When publishing results that have been facilitated by using HDF Cloud, you must cite HDF Cloud like the following:

Jülich Supercomputing Centre. (2019). HDF Cloud – Helmholtz Data Federation Cloud Resources at the Jülich Supercomputing Centre. Journal of large-scale research facilities, 5, A137.

Furthermore, you must acknowledge the resources used:

The authors gratefully acknowledge the Helmholtz Data Federation (HDF) for funding this work by providing services and computing time on the HDF Cloud cluster at the Jülich Supercomputing Centre (JSC).

First steps

The following documents describe how to access the HDF Cloud and the first steps required to make use of it. For those users, who want to just access the cloud, the web interface of the Cloud is available at Relevant topics for using the cloud are: