Hi Josh, thanks for your answer.
> > > Daniel Haas wrote: > > For a minimal administration I found the vchanger script on this mailing > > list. > > I read the documentation but I altough have some questions: > > > > How can I configure the autochanger without changing the scripts > > - one autochanger with 6 physical disks (3 for monthly and 3 for weekly > > backup) > > - two autochanger with 3 physical disks per changer (one changer for weekly > > backup one changer for monthly backup) > > - six autochanger with one physical disk > > > > Each autochanger has its own config file. In the "Autochanger" directive > in the bacula-sd.conf file, the "ChangerDevice" directive specifies the > path to the config file to use for that (virtual) autochanger. There > will be an "Autochanger" directive in bacula-sd.conf for each virtual > autochanger. Each autochanger must also be defined with "Storage" > directives in bacula-dir.conf, but that is done exactly the same as if > it were a real autochanger except for the MediaType. I usually put the > vchanger config files in /etc/bacula. Ok. I think I understand how to configure the autoloader. But is it possible to combine more physical disks to one autoloader? For example to configure two autochanger with 3 physical drives per changer. Than I can backup the weekly pool to one autochanger and the monthly pool to the other. > > I need the whole disk capacity of the physical drives (250GB) for one > > backup. > > So I think I can't work with more than one virtuell slot. > > > > The reason for multiple virtual "slots" is to allow multiple pools to > contain bacula volumes residing on the USB disk. The reason for multiple > virtual "drives" (ie. symlinks) is to allow multiple jobs to write to > the USB disk concurrently. There is no imposed restriction on the size > of a slot (file containing a bacula volume) other than OS file size > limit, capacity of the filesystem, or bacula volume size limit set by > the bacula config. In other words, the whole disk capacity may be used > regardless of the number of "slots" defined. I personally feel that it > is better to use multiple slots to purposefully keep the file sizes > smaller. In the event of a drive failure, filesystem corruption, etc. > there is then a better chance of recovering at least some data. This is > especially true if compression is used. So you think it is better to make more pools for one backup. And for every pool I need a virtuel slot, right? > > How does the autochanger know which disk is the next. (All disks have the > > same label)? > > > > I think you are confusing the filesystem label with the bacula volume > label. The vchanger script relies on autofs to mount the USB disk at a > known mountpoint. Autofs uses the filesystem label to accomplish this. > Bacula is only concerned with bacula volume labels. With MediaType = > File storage, bacula treats a regular file as a volume, writes a bacula > volume label to that file, and creates a catalog record for it just as > it would for a tape volume. > > Think of the USB disk as a magazine, as in a magazine-based tape > autoloader. The "magazine" holds some number of bacula volumes (which > are actually just regular files) in each of its "slots". Unplugging the > USB drive is equivalent to ejecting a magazine. Plugging it in is > equivalent to inserting a magazine. Bacula is in charge of which volume > it needs. Bacula queries the autochanger to determine which volume is in > the autochanger's "drive(s)". If bacula needs a volume not in a "drive" > then it tells the autochanger to load the volume it needs. vchanger > loads a volume by creating a symlink to the file containing the > requested bacula volume. If the requested volume is not on the current > "magazine" (ie currently plugged in USB disk) then the load fails and > bacula continues searching for a volume in the usual manner, which may > include informing the operator that a particular volume is needed. > > What do you think about this implementation? > > > > Should work well. I do suggest you get laptop-type USB drives for > off-site use, as they are more shock proof and designed for moving about. Thank you for your help > > I use Debian Etch with Bacula 1.38.11 > > > > Thank you very much for your help > > > > Daniel > > _____________________________________________________________________ > > Der WEB.DE SmartSurfer hilft bis zu 70% Ihrer Onlinekosten zu sparen! > > http://smartsurfer.web.de/?mc=100071&distributionid=000000000066 > > > > > > ------------------------------------------------------------------------- > > This SF.net email is sponsored by DB2 Express > > Download DB2 Express C - the FREE version of DB2 express and take > > control of your XML. No limits. Just data. Click to get it now. > > http://sourceforge.net/powerbar/db2/ > > _______________________________________________ > > Bacula-users mailing list > > Bacula-users@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/bacula-users > > > _____________________________________________________________________ Der WEB.DE SmartSurfer hilft bis zu 70% Ihrer Onlinekosten zu sparen! http://smartsurfer.web.de/?mc=100071&distributionid=000000000066 ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
