Disk quota exceeded

[gtdang]

What does it mean if disk quota is exceeded?

[gtdang]

This means that either your home, data or scratch directory is over its disk quota limit and the grace period has also expired (or you have hit the highest possible limit too).

The command to monitor your disk quota usage is:

myquota

Example output:

                   Block Limits                              |           File Limits              
Type    Filesystem           Used    Quota   HLIMIT    Grace |    Files    Quota   HLIMIT    Grace
-------------------------------------------------------------|--------------------------------------
USR     home               8.401G      10G      20G        - |    61832   524288  1048576        -
USR     scratch              332G     512G      12T        - |    14523   323539  4194304        -
FILESET data+apollo        11.05T      20T      24T        - |   459764  4194304  8388608        -

There are limits on the amount of data as well as number of files. "Grace" is the grace period you have left after you exceed the quota. After the grace period expires, you will not be allowed to write to files and a "disk quota exceeded" error will be shown. "HLIMIT" is the highest limit which can't be breached even in the grace period.

If you find you are above quota limits, you can delete or compress files to bring down your usage. If your home directory is over limits, you can move files to your data directory. You can also simply ask your PI to get additional storage allocation. Here are the rates.

[singhsaluja]

Hidden directories and files tend to accumulate, but there is a useful module available with an interactive user interface to scan for the largest ones, including hidden ones. To utilize this module:

module load ncdu
ncdu 

The initial scan may take some time, depending on the number of files. After it's complete, you can navigate using the up/down arrow keys, delete using "d," and quit using "q."