Re: Disk full - moving rsnapshot root

* David Cantrell <david@xxxxxxxxxxxxxxx> wrote:
> On Tue, Aug 15, 2006 at 09:52:34PM +0200, Sebastian Kayser wrote:
> > * Shannon S. Coen <shannon@xxxxxxxxxxxxx> wrote:
> > > The disk our rsnapshot root is on has finally filled up. I've mounted a
> > > new, bigger one and would like to move the data from the old to the new.
> > > Can this be done so that the inode/link structure remains intact
> > > (keeping disk usage the same)?
> > "mv" or "cp -a" will preserve the hard link structure, so basically your
> > disk usage will stay the same. 
> 
> That's only the case if you are working within a single filesystem.

Maybe this depends on the version of cp being used. The cp on Debian
sarge (coreutils 5.2.1-2) preserves hardlinks across different
filesystems.

~ # mount | grep ^/dev
/dev/md0 on / type ext3 (rw,errors=remount-ro)
/dev/md1 on /var type xfs (rw)
/dev/md3 on /var/spool/squid type xfs (rw,noatime)

~ # ls -li /var/tmp/hardlinks/
total 0
33640702 -rw-r--r--  2 root root 0 Aug 17 13:44 1
33640702 -rw-r--r--  2 root root 0 Aug 17 13:44 1-hardlink
33640703 -rw-r--r--  1 root root 0 Aug 17 13:44 2

~ # ls -li /tmp/hardlinks/
total 0

~ # cp -a /var/tmp/hardlinks/* /tmp/hardlinks/
~ # ls -li /tmp/hardlinks/
total 0
879555 -rw-r--r--  2 root root 0 Aug 17 13:44 1
879555 -rw-r--r--  2 root root 0 Aug 17 13:44 1-hardlink
879558 -rw-r--r--  1 root root 0 Aug 17 13:44 2

Sebastian

-------------------------------------------------------------------------
Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre-integrated technology to make your job easier
Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642