new@ee.udel.edu (Darren New) (06/19/91)
How, under Amoeba, does one do backups of the file server's disks? I realize that with distributed storage and duplicated writes, reliability is pretty high; however, I've always lost more files to stumble-fingers than to disk failures (and it's usually been more catastrophic :-). Anyway, it seems to me that if you need to know the secret parts of the capabilities to read the files, you'll have a hard time backing them up. If not, is there an undocumented service that returns information needed to back up the bullet server and directory servers? -- Darren -- --- Darren New --- Grad Student --- CIS --- Univ. of Delaware --- ----- Network Protocols, Graphics, Programming Languages, FDTs ----- +=+ Nails work better than screws, when both are driven with hammers +=+
ast@cs.vu.nl (Andy Tanenbaum) (06/22/91)
In article <56672@nigel.ee.udel.edu> new@ee.udel.edu (Darren New) writes: > >How, under Amoeba, does one do backups of the file server's disks? It is relatively straightforward since the files are immutable. No file can change out from under you when you are copying it. The owner of the file obviously has a capability for it, and can copy it explicitly. However, the normal way is to let the replication daemon do the work. Assuming you have configured a certain piece of the file system for replication, the daemon (which has the power equivalent to a superuser) automatically makes backups for you. We are currently working on a fully transparent, replicated file system, but that is not yet done. Andy Tanenbaum (ast@cs.vu.nl)