At Mon, 09 Jun 2014 17:01:25 -0400 [email protected] wrote: > > On Mon, Jun 09, 2014 at 04:13:51PM -0400, Robert Heller wrote: > > At Mon, 09 Jun 2014 22:42:00 +0300 Toomas Aas <[email protected]> > > wrote: > > > > > > > > Mon, 09 Jun 2014 kirjutas Robert Heller <[email protected]>: > > > > > > > > > > > Question: when using a disk-based 'virtual tape changer', is there is > > > > any > > > > point in using a holding disk? I understand that a holding disk is a > > > > good idea > > > > when using real tapes, as this helps in keeping the tape drive > > > > streaming -- > > > > that is the holding disk smooths out the 'bumps' in the actual > > > > backup process. > > > > > > AFAIK, when writing directly to tape - even virtual tape - only one > > > client can be dumped simultaneously. When dumping to holding disks, > > > several dumps can run in parallel. > > > > I only have *one* client (the server IS the client). (I know, Amanda might > > be > > considered overkill in this case, but Amanda does all sorts of things in > > terms > > of managing backups, etc.) > > Simultaneous dumping of multiple DLE from a single client is possible.
But probably not advisable if all of the DLEs are on a single spindle. > > If something happens to the backup device, dumps could still be > collected on, and recovered from, the holding disk. I suppose. > > jl -- Robert Heller -- 978-544-6933 / [email protected] Deepwoods Software -- http://www.deepsoft.com/ () ascii ribbon campaign -- against html e-mail /\ www.asciiribbon.org -- against proprietary attachments
