Disk quotas

Disk quotas #

Individual disk usage quotas are enforced on disk /home/users/. You can use the quota command to query your current usage and quota statistics:

quota -s

The output will look like this:

Disk quotas for user danilov (uid 1002): 
     Filesystem   space   quota   limit   grace   files   quota   limit   grace
/dev/mapper/DataGroup-Users
                 84246M    133G    143G            236k   1000k   1100k        

There are two types of limits:

  • the total size of used disk space (space);
  • the total number of files (files).

The command quota will show you the current usage for space/files, as well as the value of quota and the maximum limit. Zeros in both quota and limit fields are used as unlimited values. The operating system will not allow the user to exceed the limit value, returning the error Disk quota exceeded. However, the user may exceed the quota value for a limited time (7 days). In this case the remaining time will be displayed in the field grace.

Disk quotas for user danilov (uid 1002): 
     Filesystem   space   quota   limit   grace   files   quota   limit   grace
/dev/mapper/DataGroup-Users
                   139G*   133G    143G   7days    236k   1000k   1100k        

Add the following lines to your ~/.bashrc file in order to check quota limits at login time:

# check local quotas and print in human-readable format
quota -lq 2>/dev/null || quota -ls

Disk /home/users #

Starting from April, 2022 the following quotas are enforced in user home directories under /home/users:

  • maximum file size – 100 GB,
  • maximum number of files – 1 million.

Individual quotas are defined for users with usage exceeding 50 GB or 500k files in March, 2022: extra 50 GB and 500k files are added to the actual usage. Individual quotas are subject to gradual decrease over time.

Unlimited disks #

Starting from April, 2022 the following disks are available for users:

Path Size Availability Notes
/home/data4t 4 TB all nodes transferred from /data4t
/home/data14t 14 TB all nodes transferred from /data14t
/home/biomath 30 TB all nodes transferred from /data90t/biomath, data for biomathematics research groups
/home/geosci 40 TB all nodes transferred from /data90t/geosci, data for geoscience research groups