CURC User Policies¶
The RC login nodes are lightweight virtual machines that serve as gateways to CURC computing resources including Blanca, Summit, and Alpine. They are strictly intended for non-computational tasks including editing scripts, moving files, scheduling jobs to run on CURC computing resources, and non-intensive workflow monitoring/management tasks. They are not intended for computational tasks of any kind. CURC personnel regularly monitor processes on the login nodes and reserve the right to terminate processes in violation of this policy without notice. Repeated violations by the same user may result in a suspended account.
CURC will perform software installations for users of CURC resources in a globally accessible module stack provided:
- A user requires a specified software that is unavailable on the current stack.
- A user requires a different version of a currently existing software which provides additional functionality required for the user’s work.
- The user provides all of the relevant information including release, version, etc.
- The installation will not violate the software’s User Agreement policy.
- The installation is not better suited for a local install (i.e., Anaconda environments, Singularity containers).
Furthermore, licensed/proprietary software are subject to the following requirements:
- The user has access to a license that is valid for cluster usage.
- The license can be installed on the cluster or accessed from the cluster if it is hosted on a license server.
Software accepted to be installed will be given an estimated installation time based on team capacity and urgency of the request. Note that this time is an estimation and not a hard-set deadline. Installed software will be available to load with a module in the ‘User Software’ category in the software stack. Unused modules will be pruned after 12 months without usage. Any pruned module may be restored by user request.
Core software such as compilers, MPIs, and relevant libraries will be updated at regular intervals. A different version of these core software can be requested at any point, but installation may be performed in accordance to that timeline.
All software installations are “Best Effort” and are not guaranteed. RC reserves the right to deny any software installation that is requested on CURC resources.
To request a software installation please fill out the Software Request Form.
Scratch file purge¶
Scratch space should be used for all compute jobs run on CURC systems. These high-performance scratch directories are not backed up and are not appropriate for long-term storage. Files are automatically deleted 90 days from the date they were copied to or created on the filesystem. However, data may be purged at shorter intervals subject to overall system needs.
Users requiring longer-term retention of their files should perform regular backups to their local machine if they have not purchased space on the PetaLibrary. Inappropriate use of scratch storage, including attempts to circumvent the automatic file purge policy, may result in loss of access to Research Computing resources.
Alpine scratch quota increases¶
Each user is allocated 10 TB in
/alpine/scratch/. Users requiring more than 10 TB may request a supplemental space allocation by
submitting a brief (approximately one paragraph) justification. The justification should describe why a group’s workflow requires
the requested amount.
The CURC allocations committee will review the request and may ask for additional information or changes if necessary. Once approved, supplemental Alpine scratch allocations will be provisioned by the CURC storage team. Users should note that supplemental Alpine scratch allocations are subject to the 90-day purge policy.
CURC reserves the right to actively manage the Alpine scratch filesystem in order to ensure it is performant and that all users have adequate space. This includes the right to:
- deallocate supplemental Alpine scratch space, and/or
- shorten the 90-day data purge window if the need arises, and/or
- subject supplemental Alpine scratch allocations to annual renewal through the CURC allocations process
If at all possible, CURC will provide at least 1 week of notice if such measures are taken, in order to provide users the opportunity to copy their needed data elsewhere.
The cumulative computing allocations of a single research group across all projects may not exceed 5 M SU/year or 2.5 M SU over 6 months. Project allocations submitted by members of the same research group should have distinguishable research objectives. CURC reserves the right to reject new project allocation requests and/or suggest amendments to existing allocations.
The first Wednesday of each month is reserved for Planned Maintenance (PM). CURC resources, including compute clusters, file systems, and servers (JupyterHub, Open OnDemand, etc.), will be unavailable during this time. Users are encouraged to check https://curc.statuspage.io/ for updates on PMs. RC reserves the right to cancel, move, or extend the maintenance window as needed.
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