DB Synchronization:
•NGAS DBs
replicated from Paranal/La Silla to Garching (Unidirectional).
•Synchronization
between DBs of the various NGAS sites also carried out by NGAS.
•NG/AMS
maintains snapshot (DBM) on the disks with info about the files stored on it.
•Local DB
synchronized with this info when the disk reappears on a site.
•DB Snapshot
can be used as a table of contents for the disk.