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In order to keep filesystems from filling up and disrupting work, we use filesystem quotas to limit usage in certain areas by user or group. This also helps us observe growth in disk usage over time so we can plan future expansion.
By default, the filesystem quotas are as follows:
filesystem | quota (maximum total data size allowed) | file limit (maximum number of files allowed) |
|---|---|---|
| 100 GiB per user | none |
| varies by lab/group | none |
| varies by lab/group | none |
|
|
25 TiB per user |
2, |
500,000 files or directories |
Checking Usage
HMS Research Computing has retired the older tool for checking personal and group storage utilization and limits called quota on August 8, 2023. The replacement tool called quota-v2 retrieves more comprehensive information than the previous quota tool, executes faster, and runs on all O2 nodes (login, compute, and transfer cluster).
More information can be found in the extended quota-v2 documentation, which details the meaning of column and table in the quota-v2 output.
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Usage for mfk8 (As of 2022-10-04 16:28:47 EDT-0400) ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓ ┃ path ┃ type ┃ username ┃ usage ┃ storage limit ┃ last update ┃ ┡━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┩ │ /home │ user │ mfk8 │ 44.76 GiB │ 100 GiB │ 2022-10-04 16:28:59 EDT-0400 │ ├────────────────────────────────────────────┼───────┼─────────────────────┼─────────────┼───────────────┼──────────────────────────────┤ │ /n/groups/smith │ user │ mfk8 │ 18.67 GiB │ │ 2022-10-04 16:28:47 EDT-0400 │ ├────────────────────────────────────────────┼───────┼─────────────────────┼─────────────┼───────────────┼──────────────────────────────┤ │ /n/groups/smith │ group │ │ 13.02 TiB │ 50 TiB │ 2022-10-04 16:28:47 EDT-0400 │ ├────────────────────────────────────────────┼───────┼─────────────────────┼─────────────┼───────────────┼──────────────────────────────┤ │ /n/scratch3scratch/users │ user │ mfk8 │ 56.43 GiB │ 1025 TiB │ 2022-10-04 16:28:59 EDT-0400 │ └────────────────────────────────────────────┴───────┴─────────────────────┴─────────────┴───────────────┴──────────────────────────────┘ |
You will see a number representing your individual storage usage in your /home directory on the "user" line with the 100GiB quota. If you’re using /n/scratch3scratch, you’ll see a line for your personal usage in your sub-directory within /n/scratch3scratch/users. Some labs/cores have group directories under /n/scratch3, so that information will be reported if you’re a member of such a lab or core.
Note: It is against RC policy to artificially refresh last access time of any file located under /n/scratch3scratch.
For more information on scratch3scratch, please refer to the dedicated scratch3 scratch wiki page.
If you are a member of a group directory, you'll have a line for your “user” usage above the "group" line showing all group members' usage.
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