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filesystems:quotas

Quotas on Mogon

A quota is space allotment granted to users and projects. Its purpose is to avoid an over utilization of a file system.

Please Note: All quotas are granted in TB, not TiB (1 TB is about 0.9 TiB). The reported values by shell tools or wrapper scripts are mostly in TiB.

The Home Directory

The home directory is equal on both clusters (Mogon I and II; see our filesystem overview page for details.)

The filesystem for the home directory is optimized for small files, e.g. scripts. It currently provides a quota of 300 GB and 1 million files per user.

Mogon I / GPFS

Home directories and project storage on Mogon I are using GPFS (IBM's Global Parallel File System).

Project Quota - Defaults and Extensions

The default project Quota on the Mogon I GPFS file system is 1 TB.

Projects requiring an extension to this value need to ask the HPC team and provide a plausible argument as well as the desired figure of needed disk space. Depending on the current usage and validity of the request the HPC team may grant additional quotas.

Viewing Project Quota

If logged in to Mogon I, the current project quota (frequently identical to group quota) and the used space can be looked up with a script that conveniently wraps the necessary GPFS commands:

$ /cluster/bin/mogonquota

The values are reported in TiB.

Mogon II / Lustre

The default project Quota on the Mogon II Lustre file system is 1 TB.

Projects requiring an extension to this value need to ask the HPC team and provide a plausible argument as well as the desired figure of needed disk space. Depending on the current usage and validity of the request the HPC team may grant additional quotas.

Viewing Project Quota

If logged in to Mogon II, the current project quota (frequently identical to group quota) and the used space can be looked up with a this Lustre command:

$ lfs quota -g <projectname> /lustre/miifs01/project/<projectname>/
filesystems/quotas.txt · Last modified: 2018/04/15 07:33 (external edit)