On 2017-08-22 03:10, Kern Sibbald wrote:
Dimitri,

I have heard the same complaint from you a number of times: "Bacula sucks at disk as tapes".  It is my view that your statement is simply not true.

I think at the very basic level, a disk is a device that doesn't quack like a tape and doesn't walk like a tape. What this means is if your software is built on the tape paradigm, it can call a disk "a tape", and it will suck because it actually is not a tape. It does not matter to me what API the code calls to do addressing: the point is that a disk has multiple files on it while a tape has bytes until EOT.

Don't get me wrong, this is not specific to bacula: every tape backup software has the same conceptual limitation and has to employ some workarounds for backups to disk. But this is the bacula list, we're not talking about every software here.

Bacula, in fact, is much better than some, if you can fit all your backups on a single filesystem: bacula's built-in disk backup setup is a breeze.

However if you want to backup to removable disks and put them on the shelf when full, that's where things get less than perfect fast.

Dima

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