Theta will be unavailable from Monday, July 13, to Thursday, July 16, 2020, as we update Theta’s major OS versions. We will be upgrading ALCF-Theta from its current SLES12/CNL6 configuration to SLES15/CNL7. This will require most user codes to be rebuilt and/or relinked. We will also be upgrading Theta’s Sonexion Lustre filesystem.

These necessary enhancements will allow us to make newer software versions available, improve security and reliability, and help pave the way for Theta to connect with the coming global filesystem. For more information, including a full list of known improvements and impacts associated with the upgrade, please read the upgrade notes: https://www.alcf.anl.gov/support-center/facility-updates/major-os-update-theta