Pitzer
Guidance After Pitzer Upgrade to RHEL9
We upgraded the operating system on the Pitzer cluster from RHEL7 to RHEL9 on July 28 2025. This upgrade introduces several software-related changes compared to the RHEL7 environment used on the Pitzer and provides access to modern tools and libraries but may also require adjustments to your workflows. Please refer to
New scratch storage policy implemented
The Ohio Supercomputer Center (OSC) has implemented a new scratch filesystem storage policy. The purge period has changed from 90 days inactivity to 60 days inactivity to help alleviate recent storage stress on our scratch filesystem: https://www.osc.edu/resources/security_accessibility_and_policies
Podman
Podman is an Open Containers Initiative (OCI)‑compliant, daemonless and rootless container tool developed by Red Hat. Unlike Docker, Podman operates without a central daemon and supports secure rootless execution, making it well‑suited for HPC environments and schedulers such as Slurm.
Availability and Restrictions
Versions
Podman is available on all OSC clusters. Only one version is available at any given time. To find out the current version:
Pitzer upgrade to RHEL9 is complete
The upgrade of the Pitzer cluster to Red Hat Enterprise Linux 9 is complete. Please refer to the [Pitzer documentation](https://www.osc.edu/resources/technical_support/supercomputers/pitzer) for more information about what has changed.
