Re: Copying Group & Owner Permissions - Not On Replica

"'Brian Spraker' via unison-users" <[email protected]> writes:

> Running Unison 2.53.4.Running Ubuntu servers.
> Background:
> I have a PRF file with the settings to do a replica sync.  Essentially the purpose of the sync is to back up all home folders on the server to a backup server that is offsite.
> I have these items in the PRF file:
> auto = truebatch = trueowner = falsegroup = falsetimes = truefastcheck = trueforce = /home
> Problem:
> The replica server is just a basic Ubuntu server install.  The users that are on the main server do not exist on the backup server.
> Therefore when replicating, none of the owner and group information copies over because they don't exist.
> Is there any way to force it?  Or a way to just force the user/group number?
> The concern is if the main server's drive fails, I would be able to copy the user data from the backup server - but I will then have to set all of the ownership data manually.

Are you running unison as root?

You have owner=false.  The man page says that means don't sync owner,
and then (well before really) it talks about numeric ids:

     numericids
             When this flag is set to true, groups and users are synchronized
             numerically, rather than by name. The special uid 0 and the
             special group 0 are never mapped via user/group names even if
             this preference is not set.

     owner   When this flag is set to true, the owner attributes of the files
             are synchronized. Whether the owner names or the owner
             identifiers are synchronizeddepends on the preference numerids.



Separately, I don't think using unison for backup is a good idea.  What
I want is to store a snapshot of the state, and then later to have
additional snapshots, not discarding the earlier ones.  There is disk
failure, blocks going bad, fs scrambled, compromised system, and surely
other problems.  Replicating the current state weekly means that a fault
more than a week ago that was not detected in time is trouble.

That leads to wanting deduplication, for both space and time.   My
backup solution of choice is bup, but I can see that it's a little
hard to deal with for many.  There are other programs that are somewhat
similar, but I'm not familiar with them enough to recommend for (or
against).

To unsubscribe from this group and stop receiving emails from it, send an email to [email protected].