Update project-storage.md

docs.it4i/storage/project-storage.md

@@ -7,52 +7,85 @@ The storage can also be used for computing jobs with low I/O demands or big data
 ## Technical Overview
 
 PROJECT consists of three identical interconnected file storage servers (PROJ1-3)
-with HA NFS access and the total capacity of 15PB (3x5PB).
+with HA NFS over GPFS access and the total capacity of 15PB.
 
 **screenshot from DTS (draw.io?)**
 
-| Specification     |                                                    |
-| ----------------- | -------------------------------------------------- |
-| Protocol          | NFS over GPFS                                      |
-| Total capacity    | 15PB                                               |
-| Throughput        | 12 GB/s (3x4)|
-| IO Performance    ||
+| Specification     | Total              | Per Block           |
+| ----------------- | ---------------------------------------- |
+| Protocol          | NFS over GPFS                            |
+| Total capacity    | 15PB               | 5PB                 |
+| Throughput        | 12 GB/s (3x4)      | 4GB/s               | 
+| IO Performance    |?|?|
 
 ## Accessing PROJECT
 
-usage per project, life cycle of the users' folder:
+Data stored on the PROJECT storage is bound to a project.
+Once the project ends, new data related to this project cannot be written on the PROJECT storage.
+However, the data can be migrated to another active project's directory.
+Each block of the PROJECT File storage is an independent fileset which allows copying or moving files.
 
-data is bound to project, project disabled = data cannot be written = deleted (details TBD)
-data can be trasferred to another (active) project (folder)
-
-HOWTO:
-independent filesets = copy or move allowed
+!!!note
+    Note that 'mv' between independent filesystems is not an atomic operations.
 
 ### POSIX File Access
 
-Mountpoint - /mnt/proj1...3
+PROJECT ins an external filesystem accessible from mountpoint `/mnt/proj1` to `proj3`.
+
+PROJECT can be accessed via the following nodes:
+
+| Cluster       | Node(s)                       |
+| ------------- | ----------------------------- |
+| Salomon       | Login                         |
+| Barbora       | Login, Compute, Vizualization |
+| DGX2          | Compute                       |
 
-accessibility:
-salomon: login
-barbora: login, cn and viz
-(karolina: login, cn, and viz dgx2: cn)
+To show path to a directory on the PROJECT storage, use the `it4i-get-project-dir` command:
 
-**script example?**
+```console
+$ it4i-get-project-dir OPEN-XX-XX
+$ /mnt/proj3/OPEN-XX-XX
+```
 
 ### User Quotas
 
-monitoring for users (location of project, disk usage)
-quota for capacity and inodes per project
-ask IT4I for more storage capacity
+The PROJECT storage follows general user quotas for capacity and inodes per project set by IT4Innovations.
+monitoring for users (location of project, disk usage?)
+
+If your project requires more storage capacity,
+request additional storage space allocation in you application for computational resources (this is the preffered option).
+
+Alternativly, if the project is already active, contact [IT4I Support][a].
 
-preferred: ask before starting the project
 
-alternative when project is already active: ask support
+### Snapshot Functionality Description
 
-user/project quota
+Snapshots are created for all projects on fileset-level by running a cron script on GPFS servers.
+Snapshot is created every day and snaphots older thain seven days are deleted.
 
-snapshot functionality description
-see info in chat
+Snapshot Format:
+
+```console
+/gpfs
+ |
+ - exports
+   |
+   - DD-XX-XX
+     |
+     - .snapshots
+       | 
+       - YYYY-MM-DD-hhmmss
+       - YYYY-MM-DD-hhmmss
+
+ 
+
+   - OPEN-XX-XX
+    |
+     - .snapshots
+       | 
+       - YYYY-MM-DD-hhmmss
+       - YYYY-MM-DD-hhmmss
+```
 
 ### ACL and Linux Rights
 nfs4 acl
@@ -75,8 +108,11 @@ project is acessible from CN  (performance is limited) continuous usage = negati
 
 ## Technical Specification
 
-(detailed - separate .md file)
+For a detailed technical specification, see the Technical Specification secion.
 
 ## Summary
 
 barbora table format
+
+[a]: mailto:support@it4i.cz
+

[Jan Siwiec]

related to #78