Mail Announement to All LEO3 Users - April 2022

Dear users of the LEO3 cluster,

As stated previously (HPC Systems of the ZID - Statement of Service Levels for Systems), the LEO3 cluster is approaching its end of life and will be decommissioned soon to give way to the new LEO5 cluster.

Here are the details:

  1. We plan to take LEO3 offline on Tue, May 24 at 10:00. All operation will be terminated, and all data stored on the LEO3 SCRATCH file system will be destroyed. The LEO3 HOME file system resides on an external file server and will not be immediately affected.
  2. LEO3 SGE queues will be disabled on Fri, May 13, 2022 at 15:00. No new jobs can be started after this point in time, but running jobs should be able to complete. Interactive access will be possible through Mon, May 23, 2022.
  3. Before May 13, LEO3 should be in normal operation. This should give you sufficient time to save all data that you might need after the system has been turned off. Please start saving your data in HOME and SCRATCH as soon as possible to avoid congestion as the final date approaches.
  4. To help transfer (subject to quota) data that you need on LEO3E/LEO4, the LEO3 SCRATCH and HOME file systems are accessible on the LEO3E/LEO4 login nodes under the following mount points:
    • SCRATCH: /mnt/scratch/leo3 (until system shutdown on Tue, May 24, 10:00), and
    • HOME: /mnt/hpc_home/qt-leo3-home (until end of December 2022).

Visit to read this message and any possible updates. LEO3E and LEO4 are not affected and will remain in full operation.

The successor system LEO5 has been ordered and will provide a substantial increase in computing capacity. Planned start of "friendly user" test operation should be some time in the second half of 2022 (subject to possible delays in delivery).

We'll keep you posted, but please feel free to contact us if you have any questions or need assistance with saving your data.

With kind regards,
your ZID HPC team.

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