Compute Canada

Are there disk quotas?

Please note: The FAQ pages at the HPCVL website are continuously being revised. Some pages might pertain to an older configuration of the system. Please let us know if you encounter problems or inaccuracies, and we will correct the entries.

Disk quotas are active on the /home, /u1, and /scratch subsytems. At present these quotas have been fixed at 500 GB per user for /home, which is enough for most of our users. This quota pertains to the /home file system only. The /u1 file system has a quota of 2 TBytes to avoid uncontrolled fill-ups ("sanity quota"). Data that exceed these limits have to be moved, either off the system (see below question 4) or to the /scratch subsystem, which is not backed up (see below question 5). The /scratch system has a disk quota of 5 TB.

Note that disk quotas are enforced automatically. Once a user exceeds a quota, no further data can be written to the file system by that user, making it impossible to log in in some cases. If this happens, you need to contact us and arrange for freeing up disk space.

Some of our users currently exceed our disk quotas on /home and /u1, due to previous negotiated arrangements. For groups that require such larger quotas we can temporarily raise them to allow continuing work. We will contact these users and arrange for moving data to bring them back within the standard quota. We do not provide long-term data storage as a default.

If you have special needs concerning disk usage that exceeds the above quotas, you can contact us and make a temporary arrangement for more. However, this arrangement will be periodically reviewed and has to be time-limited.

Files in /home and /u1 are automatically backed up. Users do not have to do anything for these activities to occur.