Ergon: The disk space quotas, the quota_u command

The general principle of the disk space quotas is explained here. The specifics of the Ergon quotas are given below.

On Ergon :

  • The $HOME storage space is submitted to a group quota both in number of files (15000) and in volume: 1 TiB (1.1 TB).
  • There is a maximum time period of 14 days (depending on the extent you have surpassed the quota) for the group to return within the quota limits : This is the grace period.
  • During the grace period, it is possible on Ergon to exceed the quota by a small amount, so that an mfput command is not blocked during your simulations.

The quota_u command

  • The Ergon quota_u command allows you to obtain the current disk space consumption (yours and for each login of your group) as well as the quota limits in the $HOME space (volume and number of inodes).
  • If the quota has been exceeded, the grace period (in number of days) is indicated in the Timeleft column.
  • The Ergon quota_u command is based on the du (disk usage) unix command using the --apparent-size option in order to take into account the files migrated to tape.