Re: [Bacula-users] backup to multiple disks

Hello,

2013/5/2 Dimitri Maziuk <dmaziuk AT bmrb.wisc DOT edu>

Hi everyone,

this must be a FAQ but neither TFM nor google are being very helpful...

I have a storage server with 12 SATA drives on an HBA. I want to backup
to those drives, using file volumes of 50GB or less. The idea is to
manually swap the drives as they get full.

Drop this idea. If you need to move your backups out of datacenter then buy a tape library.

If this is not a case then why to do something manually?

Why not to use LVM or RAID to use all available hard disk space (12 x sata) for backups? Believe me, it is simpler to create a single filesystem for backups then use vchanger script (it is overcomplicated and IMVHO useless). When you have a single filesystem for backups then you can configure SD something like:

Autochanger {

Name = disk-storage

Device = File-Storage-xx

(...)

Changer Command = ""

Changer Device = "/dev/null"

}

And a number of Device resources which define a required level of concurrency and points to the same Archive directory.

I'm looking for the implementation with least moving parts. From what I
see out there my choices are

1. Autochanger.

Can I just omit the "Changer Command =" (or set it to /bin/true) and
it'll magically work?

More or less, Yes... :) above.

Or do I have to have a "fake autochanger" script -- and if I do, how is
it supposed to work with 12 drives all mounted at once? E.g. TFM has an
example of 2-drive configuration, but it doesn't say what "mtx-chager
loaded" is supposed to return in that case.

You can use vchanger, disk-changer or your custom script for that purpose. My best advice is to follow a KISS way above.

2. Give each client its own disk. I'll consider it if all else fails,
but obviously this is far from optmal.

Yes, it is far from optimal.

best regards

--
Radosław Korzeniewski
radoslaw AT korzeniewski DOT net

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