Charles Curley <[email protected]> writes: > So in theory you could allocate more vtape space that there is room on > the partition. Just make sure you never use more vtape space than you > actually have.
In theory. But you are accepting the risk that from time to time all your vtapes will be 100% full and you will not have enough space on your disk. And I don't think there is any provision in Amanda to prevent that. So I prefer to stick with the amount of vtapes equal to the real amount of disk space. > The answer to that is, "that depends". I have tried to have a vtape > size a bit larger than my typical daily backup, and then allow amanda > to use enough extra tapes to cover the largest likely backup. So most > days I use one vtape, 40-90% filled. Some days I use three or four > vtapes. All but the last are almost 100% filled. You can also play > with your split size. I don't think that depends at all unless you have a very deterministic usage patern. When the size of the daily backup is truly random, it becomes a purely mathematical problem: Each day, you are wasting on average 1/2 vtape amount of disk. So you could have vtape being half the size of what you are using, wasting 1/4 of the initial amount, but then you are wasting x blocks overheard for declaring new directories and using more inodes. When do both fucntions cross? Best regards, Olivier --
