Re: [Bug-tar] --listed-incremental issues

[ashley willis]

On Tue, 5 Jul 2011, Sergey Poznyakoff wrote:

> ashley willis <address@hidden> ha escrit:
>
> > the original command without --listed-incremental works:
> >
> > # cd "/mnt" && find . -depth -xdev ! -type s -print0 | tar --create --null \
> >   --files-from=- --ignore-failed-read --same-permissions --no-recursion \
> >   --totals --level=0 --verbose --sparse -b 20 --file /mnt/flexbackup/mnt.0.tar
>
> It would add each non-directory member to the archive twice. Was that 
> intended?

you already addressed and corrected.

> > # cd "/mnt" && find . -depth -xdev ! -type s -print0 | tar --create --null
> >   --files-from=- --ignore-failed-read --same-permissions --no-recursion \
> >   --totals --listed-incremental=/mnt/flexbackup/mnt.0.snapshot --level=0 \
> >   --verbose --sparse -b 20 --file /mnt/flexbackup/mnt.0.tar
>
> That's even more risky: incremental backups work by comparing 
> directory contents and metadata with the information stored on a 
> previous run. It is not a good idea to give individual files as 
> arguments to tar in incremental mode.

so i discovered after sending my emails, including someone in 2005 
trying to do what i was trying. the documentation should state this.

> To avoid archiving sockets, I'd suggest creating an exclude list
> instead. E.g:
>
> find . -depth -xdev -type s |
> tar -C /mnt \
>     --create --null \
>     --files-from=- --ignore-failed-read --same-permissions --no-recursion \
>     --totals --listed-incremental=/mnt/flexbackup/mnt.0.snapshot --level=0 \
>     --verbose --sparse -b 20 --file /mnt/flexbackup/mnt.0.tar \
>     --exclude-from - .

i suppose that would work, minus the "--files-from=-" and "--null". 
and i might be able to have --exclude work for me. thanks.

-ashley
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