HPC4 currently offers three different types of storage: home directories, group storage and scratch storage. All storage types are accessible from all HPC4 nodes.
Home Directories
Each user account has a quota of 200GB in the home directory. If you are in need of more space, please use your group storage space.
Group Storage
Each research group has a quota of 10TB in /project/<groupname>. Additional space up to 50TB is available at no charge, while anything above 50TB will be charged at standard rates, please have your PI send an email to hpc4support@ust.hk for information.
Scratch Storage
A 500TB of all flash, high speed disk mounted on /scratch. Scratch space is provided for users in /scratch/<username> to store intermediate files required during the duration of a job. These scratch file systems are not backed up. Files that have not been accessed for 60 days are automatically scrubbed. The quota can be extended upon request. Please send an email to hpc4support@ust.hk for information.
A summary of different storage spaces
|
Home Directory |
Group Storage |
Scratch Storage |
||
|---|---|---|---|---|
|
Intended Usage |
Personal home directory for storing source code, executables, container images, Conda environments and small data sets |
Shared space for members of PI research group to share data, source code and software packages. Also as an extension for personal storage space for PI members |
Fast and high throughput SSD storage for storing job input and output data files for a short period of time |
|
|
Quota Scope |
Per-user |
Per PI research group |
Per-user |
|
|
Default Quota |
200GB |
10TB |
500GB |
|
|
Backup |
Yes | No | No | |
|
House-keeping Policy |
No |
No |
|
|
To check the usage on the home and scratch file system, you can use the below command.
% df -h /home /project /scratch Filesystem Size Used Avail Use% Mounted on 10.3.2.1:/hpc4home 200G 0 200G 0% /home 10.3.2.1:/hpc4project 10T 0 10T 0% /project 10.3.2.1:/hpc4scratch 500G 0 500G 0% /scratch