> -----Messaggio originale----- > Da: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] Per conto di Jon LaBadie > Inviato: martedì 8 novembre 2005 16.24 > A: [email protected] > Oggetto: Re: R: 2 tapes backup... > > > On Tue, Nov 08, 2005 at 02:54:20PM +0100, Montagni, Giovanni wrote: > >> > >> -----Messaggio originale----- > >> Da: [EMAIL PROTECTED] > >> [mailto:[EMAIL PROTECTED] Per conto di Gene Heskett > >> Inviato: martedì 8 novembre 2005 14.23 > >> A: [email protected] > >> Oggetto: Re: 2 tapes backup... > >> > >> > >> On Tuesday 08 November 2005 03:11, Montagni, Giovanni wrote: > >> >My backup have to use 2 different tapes to do full dumps. > >> >I read the amanda's docs, but i can't understand how can i tell to > >> >amanda to use 2 tapes without tape changer (i use an lto > drive so i > >> >have to change tape manually at the morning when i arrive > to work, tha > >> >backup start late at night). I tried with chg-manual, but i can't > >> >switch tape when it is ran by cron. > >> > >> Why not? The change tape message should be waiting for you in the > >> morning, and when you've changed the tape, amanda should > be able to > >> resume, having completed the backup to the holding disk in the > >> meantime. So all it needs to do is flush the remainder. > Or, maybe > >> you have to issue the amflush command when you've changed > the tape in > >> the morning. I'm not 100% sure, never having used chg-manual > >> personally. > >> > >> You need enough holding disk for that of course. > >> Not having enough holding disk seriously limits amanda's abilities. > >> > > I don't use the holding disk, because i don't have enough free space > >> to store data twice (the data itself and backup). > > > > The holding disk only stores untaped data. Not all the data > will be on the holding disk at the same time. And if you are > using software compression the dumped data will be smaller > than the original. While it would be nice to have sufficient > free space as your total data, the holding disk need not be > that large. > > From a cost perspective, your lto drive cost multi-thousand > dollars if I read the market correctly. And tapes cost $30 > or more each. It would be only a few percentage points of > your total backup investment to add an inexpensive disk and > dedicate it to holding disk space. >
I know it very well, but i can't buy anything. It's another person who decides what to buy... What can i do is ask to him. > The benefits would be improved total time of backup due to > parallelism of multiple, simultaneous dumps and completion of > the dump before you arrive the next morning. As it stands > now, only one DLE (Disk List > Entry) can dump at a time. And, even with a second tape, the > dump will continue the next morning while people are working. > > However, you don't need a holding disk to use chg-manual. > But there is little to go on from your description of your > attempts. What changes did you make to amanda.conf to "try > with" chg-manual? Was runtapes one of them? What was your > observation that it did not work? Did you read the comments > in chg-manual? Hint, always a good idea with script as they > may point out some parameters the need to be set. As I > recall, by default chg-manual will notify you on your > terminal to change the tape. If this is run from cron there > will be no terminal. But there is, in the script, a way of > changing from terminal messages to email messages. I had thought that chg-manual script was provided "as is", so there no way to redirect the notify. Looking into it as you suggest i found that i can change many parameters, as the number of slot, the notify... > > With a holding disk, the next morning when you change the > tape, amanda would just dump the untaped archives to the > second tape. But without the HD, amanda will resume its > dumping, compressing, indexing, network traffic, and taping. > All during business hours. In addition to the impact that may > make on your users, it also means amanda is backing up file > systems while they are actively in use and possibly changing. > Never a good idea. > I run to buy a holding disk! > No, you don't need a holding disk, but get one! > > jl > -- > Jon H. LaBadie [EMAIL PROTECTED] > JG Computing > 4455 Province Line Road (609) 252-0159 > Princeton, NJ 08540-4322 (609) 683-7220 (fax) > Thanks a lot to your help. I understand many many things... Giovanni
