Merge remote-tracking branch 'origin/barnard-cleanup' into barnard-cleanup

doc.zih.tu-dresden.de/docs/jobs_and_resources/architecture_2023.md

@@ -28,26 +28,26 @@ computations, please use interactive jobs.
 
 ## Storage Systems
 
+For an easier grasp on the major categories (size, speed), the
+work filesystems now come with the names of animals.
+
 ### Permanent Filesystems
 
-We now have `/home`, `/projects` and `/software` in a Lustre filesystem. Snapshots
-and tape backup are configured. For convenience, we will make the old home available
-read-only as `/home_old` on the data mover nodes for the data migration period.
+We now have `/home` and `/software` in a Lustre filesystem. Snapshots
+and tape backup are configured. (`/projects` remains the same until a recabling.)
 
-`/warm_archive` is mounted on the data movers, only.
+The Lustre filesystem `/data/walrus` is meant for larger data with a slow
+access. It is installed to replace `/warm_archive`.
 
 ### Work Filesystems
 
-With new players with new software in the filesystem market it is getting more and more
-complicated to identify the best suited filesystem for temporary data. In many cases,
-only tests can provide the right answer, for a short time.
-
-For an easier grasp on the major categories (size, speed), the work filesystems now come
-with the names of animals:
+In the filesystem market with new players  it is getting more and more
+complicated to identify the best suited filesystem for a specific use case. Often,
+only tests can find the best setup for a specific workload.
 
 * `/data/horse` - 20 PB - high bandwidth (Lustre)
-* `/data/octopus` - 0.5 PB - for interactive usage (Lustre)
-* `/data/weasel` - 1 PB - for high IOPS (WEKA)  - coming soon
+* `/data/octopus` - 0.5 PB - for interactive usage (Lustre) - to be mounted on AlphaCentauri
+* `/data/weasel` - 1 PB - for high IOPS (WEKA)  - coming 2024.
 
 ### Difference Between "Work" And "Permanent"
 
@@ -55,8 +55,11 @@ A large number of changing files is a challenge for any backup system. To protec
 our snapshots and backup from work data,
 `/projects` cannot be used for temporary data on the compute nodes - it is mounted read-only.
 
+For `/home`, we create snapshots and tape backups. That's why working there,
+with a high frequency of changing files is a bad idea. 
+
 Please use our data mover mechanisms to transfer worthy data to permanent
-storages.
+storages or long-term archives.
 
 ## Migration Phase
 
@@ -64,8 +67,10 @@ For about one month, the new cluster Barnard, and the old cluster Taurus
 will run side-by-side - both with their respective filesystems. We provide a comprehensive
 [description of the migration to Barnard](migration_to_barnard.md).
 
+<! --
 The follwing figure provides a graphical overview of the overall process (red: user action
 required):
 
 ![Migration timeline 2023](../jobs_and_resources/misc/migration_2023.png)
 {: align=center}
+-->
\ No newline at end of file