Musings on ZFS Backup strategies

Daniel Eischen deischen at
Fri Mar 1 20:39:49 UTC 2013

On Fri, 1 Mar 2013, kpneal at wrote:

> On Fri, Mar 01, 2013 at 12:23:31PM -0500, Daniel Eischen wrote:
>> Yes, we still use a couple of DLT autoloaders and have nightly
>> incrementals and weekly fulls.  This is the problem I have with
>> converting to ZFS.  Our typical recovery is when a user says
>> they need a directory or set of files from a week or two ago.
>> Using dump from tape, I can easily extract *just* the necessary
>> files.  I don't need a second system to restore to, so that
>> I can then extract the file.
>> dump (and ufsdump for our Solaris boxes) _just work_, and we
>> can go back many many years and they will still work.  If we
>> convert to ZFS, I'm guessing we'll have to do nightly
>> incrementals with 'tar' instead of 'dump' as well as doing
>> ZFS snapshots for fulls.
> What about extended attributes? ACLs? Are those saved by tar?

I think tar (as root or -p) will attempt to preserve those.


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