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filesystems:quotas [2018/04/15 07:33] (current)
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 +====== 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 [[https://​en.wikipedia.org/​wiki/​Tebibyte|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 [[filesystems:​overview|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 ([[https://​en.wikipedia.org/​wiki/​IBM_General_Parallel_File_System|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:
 +
 +<code bash>
 +$ /​cluster/​bin/​mogonquota
 +</​code>​
 +
 +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:
 +
 +<code bash>
 +$ lfs quota -g <​projectname>​ /​lustre/​miifs01/​project/<​projectname>/​
 +</​code>​
  
filesystems/quotas.txt · Last modified: 2018/04/15 07:33 (external edit)