2. Storage configuration and usage

2.1. Storage configuration

Accessible machine	Area	Quota	Description
Large-scale Parallel Computing Server/Accelerator server	/home/UID*1	500GB	This area is user’s home directory and stores data of supercomputing system.
Large-scale Parallel Computing Server/Accelerator server	/work/xxx*2	none	This is Lustre area. Please use the scratch if the sum of the output file exceeds 500GB.Move the necessary data to user’s home directory and remove the unnecessary data from this area.
Large-scale Parallel Computing Server/Accelerator server	/work/scratch/xxx*2	none	This is Lustre area aimed for outputting a temporary file, such as a Gaussian.

(*1) UID：user account

(*2) xxx：Any directory or file that the user has created.

Attention

The files not accessed more than one month are automatically deleted in scratch area of /work. We do not back up data stored in the user’s home directory. Therefore, users are advised to regularly move any necessary data to a safe location.

2.2. How to check /home usage

When you log in to the front-end node, the usage status of the /home area is displayed.

Disk quotas for prj 12345 (pid 12345):
Filesystem    used   quota   limit   grace   files   quota   limit   grace
/home  20.11G    500G    550G       -  228066       0       0       -
username@super1:~>

・Checking with a command

lfs quota -p $UID -h /home

・Example

username@super1:~> lfs quota -p $UID -h /home
Disk quotas for prj 12345 (pid 12345):
Filesystem    used   quota   limit   grace   files   quota   limit   grace
/home  20.11G    500G    550G       -  228066       0       0       -
username@super1:~>

Attention

If you want to expand the quota capacity of the /home area, you need to apply for disk quota expansion. We will send you an application form, so please contact the Center for Computational Materials Science by email.