Migration of SCC compute/login nodes to new images from 2024-10-30 08:00 CET to 2024-11-04 17:00 CET

This maintenance has been concluded as planned.

This maintenance is now starting as planned.

The SCC compute and login nodes will be migrated to new images (for most, this is an upgrade from Scientific Linux 7 to Rocky Linux 8) and a new netboot server. The login node gwdu102 will migrate first on October 30. Then the compute nodes in the medium, fat, and fat+ partitions will migrate (nominally October 30). Then the compute nodes in the gpu partition will migrate (nominally November 1). Then the compute nodes in the gpu-int, vis, and sgiz partitions will migrate (nominally November 4). Finally, the login node gwdu101 will migrate last on November 4.

Unless there are problems, login nodes will need 30-60 minutes to migrate and compute nodes 20-60 minutes. The one exception are the dge[008-012] nodes in the viz and gpu-int partitions which will be down for up to a few hours for migration.

Existing user codes compiled for the old SL7 images may break on the new Rocky 8 images and require recompilation. Codes that had previously used many system libraries during compilation may need to compile against libraries from the module system instead when they are next recompiled.