Scheduled for Monday 25th January 2021 at 08:00 (Central Time (US & Canada))
Schedule/description of work
The CRANE cluster will undergo an *extended* downtime during the week of January 25th through February 1st. This downtime will be used to upgrade the operating system used on the cluster from an EL6 base to an EL8 base. While it has served us well for over half a decade, the current operating system has reached the end of its supported lifecycle and will no longer receive security updates necessitating this change. Additionally, it is increasingly challenging to support modern research software and codes on an aging platform as more and more of those codes expect or require more modern operating systems. While we understand this may be inconvenient to some, this move is necessary for us to continue supporting the evolving research needs of the University system. During this downtime, the Rhino, Anvil, Attic, and Common (accessible via Rhino) resources will remain available. The servers backing Crane’s /work and /home filesystems will be upgraded during this time meaning they will not be accessible even upon special request. If you think you will need access to these filesystems during the downtime you will need to copy your data elsewhere prior to the downtime start. Data on Crane’s /work and /home filesystems is not intended to be removed and should remain after the downtime. As a reminder while /home is replicated and backed up, the /work filesystem is intended to serve as a temporary scratch filesystem and has no backups. While we don’t anticipate any data loss, important data on Crane should be moved/backed up prior to this scheduled downtime. Any questions about this upcoming downtime should be directed at firstname.lastname@example.org. Additional announcements will be made as the time draws closer.
The upcoming downtime of the CRANE cluster previously scheduled for the week of January 4th through January 11th has been rescheduled to the week of January 25th through February 1st. This rescheduling is necessary to allow additional preparation and time for testing as we work through some unexpected compatibility issues with the newer and more supported software stacks. While we understand that this rescheduling, and the downtime in general, may be inconvenient it will help us minimize the amount of time CRANE is unavailable for use and hopefully result in fewer unexpected issues once the system is back online. As a reminder this is an *extended* downtime involving a major upgrade of the operating system used on CRANE and its associated components. It is necessary because the existing system has reached the end of its supported lifecycle. The original message with corrected dates can be viewed at https://status.hcc.unl.edu/maintenance/11ce5b0f-3fca-450c-93bf-b88cc0d2ccb4