Quotas

To ensure that everyone has a fair share of resources, we enforce a set of quotas in the cluster.

Disk quotas

Default disk quotas

This section lists the default per-user disk quotas. These quotas are subject to change as we learn more about the usage patterns.

Global disk quotas

Global disk quotas are quotas on filesystems that are shared across all nodes.

Checking your disk quota

The method for checking your disk quota depends on the filesystem type (FS Type). The filesystem type is listed in the default disk quotas section. This section describes how to check your disk quota for each filesystem type.

ceph

To check your disk quota, run the following command:

getfattr -n ceph.quota "<path>"

For example, to check the disk quota for your home directory, run the following command:

getfattr -n ceph.quota "$HOME"

In the output below, the user ben has a quota of 20 GiB and unlimited (represented by 0) files in their home directory.

# file: home/ben
ceph.quota="max_bytes=21474836480 max_files=0"

To check your current usage, run the following commands:

getfattr -n ceph.dir.rbytes "<path>"
getfattr -n ceph.dir.rfiles "<path>"

For example, to check the current usage of your home directory, run the following commands:

getfattr -n ceph.dir.rbytes "$HOME"
getfattr -n ceph.dir.rfiles "$HOME"

In the output below, the user ben has used 16.8 GiB of space across 210,104 files in their home directory.

# file: home/ben
ceph.dir.rbytes="18056911629"

# file: home/ben
ceph.dir.rfiles="210104"

Requesting a disk quota increase

If you find that you regularly exceed your quotas, you can request for a quota increase by specifying your desired quota in your profile and have your WATcloud contact¹ approve it. You can edit your profile using the Profile Editor.

CPU and memory quotas

On login nodes, per-user CPU and memory quotas are enforced to prevent resource starvation:

Unlike disk quotas, we don't allow users to request CPU and memory quota increases. Please use SLURM to run resource-intensive jobs.