Re: Live Fille System Backup
On 04-05-17, Sergei G wrote:
> That's good to know.
>
>
> Thank you
>
>
> On 5/4/17 6:46 PM, Anders Andersson wrote:
> > On Fri, May 5, 2017 at 1:17 AM, Sergei G <sergeig.public@gmail.com> wrote:
> > > I would like a backup tool that does not bring a million dependencies with
> > > MBs of files. Something that works on server without X Windows and can send
> > > backup to an externally attached USB drive. Nothing fancy. No network
> > > infrastructure. Incremental backups would be greatly appreciated. Ability
> > > to pipe to a compression program is a plus, just like I did with dump.
> > > [...]
> > > Any advice would be greatly appreciated.
> > You won't like my solution, and it doesn't work with your current
> > setup because it requires a specific file system: btrfs[1]. I'm
> > posting it here for two reasons:
> > 1) You might consider using btrfs on new installs
> > 2) Someone else may search and find the thread
> >
> > After switching to btrfs I can now take instant snapshots of selected
> > filesystems, transfer these to remote servers for backup, and most
> > important: btrfs can track the *exact difference* between two
> > snapshots taken over time, and only transfer the changes. All of this
> > is very quick, because the filesystem already knows exactly what
> > changed: Permission bits, file sizes, deleted files, changed data,
> > whatever, all is already kept in a log. It also means that nothing
> > will be missed, for example ACL bits etc.
> >
> > The delta is just a simple stream of data that can be compressed if
> > necessary. Typically it is transmitted to a backup server where it is
> > "replayed" so that you have a full clone of the original system.[2]
> >
> > In debian I use the little tool, btrbk[3], to automate all of this.
> > You can simply do it manually if you want.
> >
> > [1] https://btrfs.wiki.kernel.org/index.php/Main_Page
> > [2] https://btrfs.wiki.kernel.org/index.php/Incremental_Backup
> > [3] https://github.com/digint/btrbk
> >
>
Perhaps rsync can do the job for you?
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