Dear Sergey,
on Mon, 04 Oct 2004 15:26:37 +0300 you wrote:
> Niels Laukens <[EMAIL PROTECTED]> wrote:
>
> > tar --create --one-file-system --preserve-permissions --label "Bla" \
> > --exclude="/some/file" --listed-incremental "listfile" \
> > /boot /usr /var /tmp / | bzip2 ...
>
> --one-file-system option means 'do not dump any directories that are
> on filesystems other than the current one', i.e. mount point directories
> are added to the output archive, but their content is not. Consequently,
I - and probably others, too - would expect that
tar --one-file-system ... dir1 dir2 ...
would put the same list of files into the tarball as printed by the
command
find dir1 dir2 ... -xdev -print
I would ESPECIALLY expect that this behaviour does NOT depend on the
use of "--listed-incremental" - the bevahoour of tar regarding which
directories are scanned and archived should change between a full
dump and an incremental dump.
> when restoring from the incremental backup, tar assumes the directories
> where empty. This is what occurs with root/boot directory in your example.
I'm not sure which role restoring plays here. What I see is that some
files are not even put into the archive inthe first palce, and that
this behavious CHANGES depending if I use relative or absolute path
names.
> No, it is not. Using --one-file-system (and, generally speaking, any
> option abridging the set of files to be included in the archive) implies
> that these files will be lost when extracting from the resulting archives.
But this works perfectly fine when as long as I don't use incremental
dumps. So what's the difference?
> > or am I just not using the right commands?
>
> Do not use --one-file-system when creating incremental archives.
And what is your recommendation how to perform regular full and
incremental dumps in a hierarchy of mounted filesystems, where you
for example want to omit any (NFS) mounted subdirectories?
[I've just run into the same problem - see my previous message to
this list which includes a test case.]
Best regards,
Wolfgang Denk
--
Software Engineering: Embedded and Realtime Systems, Embedded Linux
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: [EMAIL PROTECTED]
"Don't worry about people stealing your ideas. If your ideas are any
good, you'll have to ram them down people's throats." - Howard Aiken
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