mass-storage/mass-storage-quota.md

@@ -2,31 +2,35 @@
 
 [[_TOC_]]
 
-# Quotas 
+# Quota purpose
 
-Storage space is finite and expensive. For this reason, space allocated to each laboratory and to each user are limited by a quota. 
+Storage space is finite and expensive. For this reason, space allocated to each laboratory, platform and user is limited by a quota.  
 
-**WARNING**: Once the quota of a folder is reached, users stop being able to write in it. If this happen while saving files, it may lead to data corruption and lost of data. Some tools will give a warning or an error message but other won't. **It's the user's responsibility to make sure there is enough space to write in the folder.**
+Quota are also needed to prevent a user to fill the whole disk space, for exemple with an uncontrolled loop in a script, and to block the whole system.
 
-## Which folders are these quota applied to?
+**WARNING**: Once the quota of a folder is reached, users stop being able to write in it. If this happen while saving files, it may lead to data corruption and lost of data. Some tools will give a warning or an error message but others won't. **It's the user's responsibility to make sure there is enough space to write in the folder.**
 
-The space of the **user personal home** is limited to **100 GB**. This quota apply only to files you have in your personal space, and not to the files you can reach through the Research, Platforms, Administration or Resources links in the \_SHARE\_ folder. Once this limit is reached, the user won't be able to create/save any file in their home. 
 
-For the Research Units, quotas are set at the level of **research laboratories** (see "Laboratories" column in the [URT tree structure](mass-storage/mass-storage-URT)). Once a laboratory's quota is reached, it won't be possible to write anything in any of the group and project folders attached to that laboratory. Folders where groups share data with GIGA platforms are included in this quota.
+# Quota implementation
 
-For the **Platforms**, quotas are set at the level of the laboratories too (see "Laboratories" column in the [PTF tree structure](mass-storage/mass-storage-PTF)). Files transferred by the platforms to the folder shared with each research group are not included in the platform's quota.
+The space of the **user personal home** is limited to **100 GB**. All files in the user's personnal folder and subfolders are included in this quota, but not the files the user can reach through the "Research", "Platforms", "Administration" or "Resources" links in the ""\_SHARE\_" folder. Once this limit is reached, the user won't be able to create/save any file in their home. 
 
-## How can users know how much space is left in a folder?
+For the Research Units, quotas are set at the level of **research laboratories** (see "Laboratories" column in the [URT tree structure](mass-storage/mass-storage-URT)). This means that these quotas are shared between groups belonging to the same laboratory. Once a laboratory reaches its quota, it's not possible to write anything in any of the group and project folders attached to that laboratory. 
 
-We are currently developing a tool that will allow each user to check the quota allocated to a given laboratory/platform/home folder, and the percentage of this quota currently used. 
+For the **Platforms**, quotas are set at the level of the groups (see "Groups" column in the [PTF tree structure](mass-storage/mass-storage-PTF)). Files transferred by the platforms to research groups via the [platform-shared folders](mass-storage/mass-storage-structure-organisation#Platform-shared folders) are not included in the platform's quota but in the associated research laboratory's quota.
 
-In the meantime, for your home folder, you can check the space you use and therefore calculate how much space you have left. For the laboratory and platform quotas, you can contact the [Bioinformatics team](contacts).
+# Practical considerations
 
-## What to do if a folder is about to reach its quota?
+* **How to find out how much space is left in a folder?**  
+  We are currently developing a tool that will allow each user to check the quota allocated to a given laboratory/platform/home folder, and the percentage of this quota currently used. 
+  In the meantime, for their home folder, users can check the disk usage and therefore calculate how much space is left before to reach 100GB. 
+  For laboratories and platforms quotas, users can contact the [Bioinformatics team](contacts).
 
-The first thing to do is to go through the data to delete all files and folders that are not needed anymore and compress everything that can be compressed. Several recommendations to reduce disk space usage, are detailed in the [“Data maintenance”](mass-storage/mass-storage-management-practices) section. If needed, the UDI GIGA-MED IT specialists or the bioinformatics team can help to find ways to further reduce disk space usage.
+* **What to do if a folder is about to reach its quota?**  
+  The first thing to do is to go through the data to delete all files and folders that are not needed anymore and compress everything that can be compressed. Several recommendations to reduce disk space usage can also be found in the [“Data maintenance”](mass-storage/mass-storage-management-practices) section. If needed, the UDI GIGA-MED IT specialists or the bioinformatics team can help to find ways to further reduce disk space usage.
 
-If required for a specific project, the PI can contact the UDI GIGA-MED IT specialists to ask for an expansion of the storage space hard quota. This request of more storage space will have to be reasonable and justified. 
+* **Modalities to require an extension**  
+  If required for a specific project, the PI can contact the UDI GIGA-MED IT specialists to ask for an expansion of the storage space quota. This request of more storage space will have to be reasonable and justified.