In a computer center, pubsets and archives are used flexibly:
Pubsets are detached from one system and connected to another.
User IDs are moved from one pubset to another.
Migrated files are deleted or are brought back to the processing level S0. This means that the storage levels S1 and S2 require regular reorganization.
The extent of the damage resulting from a system crash or operator error should be kept to a minimum (e.g. restricted to a single pubset).
If a system crash or operator error leads to a loss of data, the data must be restored in such a way that work on undamaged pubsets can proceed unimpeded.
Administration work carried out on a pubset (backup, migration, reorganization, ...) should not interfere with users working on other pubsets.