Migration of the HC-CLUSTER to LEO1
LEO1 was built as a stand-alone system running on new hardware which is based on AMD CPUs (Shanghai). It consists of one login node and four computing nodes comprising a total of 64 cores. LEO1 uses the same naming convention as its bigger brother LEO2: its login node is called login.leo1.uibk.ac.at while the compute nodes are named nxxx.leo1.uibk.ac.at where xxx is a consecutive node number.
For multiple reasons the nodes of the HC-CLUSTER will now be integrated into the LEO1 cluster. This migration goes hand in hand with a totally renewed and updated software environment as well as an upgrade of the operating system and the Sun Grid Engine. Additionally, you will come across a simplified module environment, which, for now, comprises only a few modules but may later be extended according to your specific software demands. Please drop us an email (zid-cluster-admin@uibk.ac.at) and let us know which software packages you need.
During the migration process both systems, the HC-CLUSTER and the LEO1, are available. In the upcoming weeks nodes from the HC-CLUSTER will successively be migrated into the LEO1 cluster. We kindly ask all HC-CLUSTER users to login at login.leo1.uibk.ac.at, then adapt their applications to the new module environment and, finally, rerun the build process. The migration process is considered complete if every user has successfully run his application(s) on the LEO1 cluster.
Please do note that we offer the new scratch space /hpc-scratch. Get the usage instructions here.
One of the biggest differences compared to the HC-CLUSTER is the limited job runtime, which we have set to 24 hours (wall clock time). Please split your job's runtime into chunks which do not exceed this limit. We are aware that this will be a difficult task, heavily depending on each application and are currently about to devise appropriate checkpointing strategies. Please do not hesitate to refer questions about this issue to your ZID HPC team.
The LEO1 documentation website can be found at http://www.uibk.ac.at/zid/systeme/hpc-systeme/leo1.