[OpenAFS] Backup methods

Brian Sebby sebby@anl.gov
Thu, 29 Mar 2007 14:14:53 -0500

The only software that I'm aware of that currently supports AFS backups 
natively is TIBS.  Veritas NetBackup used to support AFS, but they officially
discontinued support a couple of versions ago (although the plugin continues
to work for now).

The main issue in backing up AFS is that you need to preserve the ACLs that
are stored in the directory structure - if you just back it up as files
you're going to lose that.

What we do (and I suspect many others) is to use the command 'vos dump' to
dump each volume to a disk file that contains the ACL information.  The
downside to this is that you don't have file backups from AFS - just volume
backups.  To get the names of the volumes to dump, I use the 'vos backupsys'
command to create .backup volumes of all of my volumes at a certain time of
day (usually 4am), and then have a script parse the output of the
'vos listvol' command to find all the backup volumes and back those up.

I could send you the script if you're interested, but I'd need to clean it
up first - it contains some site-specific stuff that I'd need to remove.


On Thu, Mar 29, 2007 at 10:07:42AM +0200, Gert Burger wrote:
> Morning
> We are currently switching to openafs but are concerned about how to 
> backup our data.
> Our current setup uses bacula to backup all our data to a central server 
> which stores incrementals/differentials and full backups for up to 2 months.
> We would like to continue using it when all our users(Over 4000) have 
> been moved to openafs.
> Any ideas?
> -- 
> Gert Burger
> TechTeam
> Computer Science Department
> University of Pretoria
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