Difference between revisions of "FAQ"
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For questions about specific software such as Python, OpenOnDemand, or Custom Installations, visit [[Applications FAQ]] | For questions about specific software such as Python, OpenOnDemand, or Custom Installations, visit [[Applications FAQ]] | ||
==Accounts and Investment== | ==Accounts and Investment== | ||
Revision as of 16:23, 1 September 2023
Applications
For questions about specific software such as Python, OpenOnDemand, or Custom Installations, visit Applications FAQ
Accounts and Investment
Q: How do I get a HiPerGator account?
- A: HPG accounts must be requested via the account request form and receive a valid sponsor's approval.
Q: How do I purchase HiPerGator resources or reinvest on expired allocations?
- A: If you're a sponsor or account manager, please fill out a purchase form at https://www.rc.ufl.edu/get-started/purchase-allocation/
Q: How to add users to a group?
- A: All users must submit a ticket via the RC Support Ticketing System with the Subject line in a format similar to "Add (username) to (groupname) group" in order to gain access to a given group.
Q: I can't login to my HPG account.
- A: Visit our Blocked Accounts wiki page
Q: How can I find out what allocations have expired or about to expire?
- A: Please use the showAllocation tool in the 'ufrc' env module. See UFRC_environment_module for reference on all HPG tools.
Architecture
Nodes
Q: What's the difference between GPU and HWGUI partitions?
- A: HWGUI partitions are technically GPU partitions, but HWGUI is more dedicated to interface visualization for software whos GUI requires hardware acceleration, but it's not directed to high performance computing the way GPU partitions are.
Storage
Q: I can't see my (or my group's) /blue or /orange folders!
- A: If you are listing /blue or /orange you won't see your group's directory tree. It's automatically connected (mounted) when you try to access it in any way e.g. by using an 'ls' or 'cd' command. E.g. if your group name is 'mygroup' you should list or cd into /blue/mygroup or /orange/mygroup. See also this short video: https://web.microsoftstream.com/video/87698fe6-84df-40dc-9d22-c3a6c63820fa
Q: Why do I see "No Space Left" in job output or application error?
- A: If you see a 'No Space Left' or a similar message (no quota remaining, etc) check the path(s) in the error message closely to look for 'home', 'orange', 'blue', or 'red' and check the respective quota for that filesystem. All quota commands are in the 'ufrc' environment module and include 'home_quota', 'blue_quota', 'orange_quota'. See Getting Started and Storage for more help.
A convenient interactive tool to see what's taking up the storage quota is the ncdu command in a bash terminal. You can run that command and delete or move data to a different storage to free up space.
If the data that's taking up most of the space is related to application environments and packages such as conda, pip, or singularity, you can modify your configuration file to update the default directories for custom installs. You can find more information about the .condarc setup here: Conda
Performance
Q: Why is HiPerGator running so slow?
- A: There are many reasons why users may experience unusually low performance while using HPG. First, users should ensure that performance issues are not originated from their Internet service provider, home network, or personal devices.
Once the possible causes above are discarded, users should report the issue as soon as possible via the RC Support Ticketing System.
When reporting the issue, please include detailed information such as:
- Time when the issue occurred
- JobID
- Nodes being used, i.e. username@hpg-node$. Note: Login nodes are not considered high performance nodes and intense jobs should not be executed from them.
- Paths, file names, etc.
- Operating system
- Method for accessing HPG: Jupyterhub, Open OnDemand, or Terminal interface used.
Q: Are there profiling tools installed on HiPerGator that help identify performance bottlenecks?
- A: The REMORA is the most generic profiling tool we have on the cluster. More specific tools depend on the application/stack or the language. E.g. cProfile for python code, Nsight Compute for CUDA apps, or VTune for C/C++ + MPI code.
Q: Why is my job still pending?
- A: According to SLURM documentation, when a job cannot be started a reason is immediately found and recorded in the job's "reason" field in the squeue output and the scheduler moves on to the next job to consider.
Related article: Account and QOS limits under SLURM
- Common reasons why jobs are pending
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