Re: [Dump-users] Does restore purge extraneous files (orphans)?

[Stelian P. <st...@po...>]

Le jeudi 13 décembre 2007 à 04:16 +0000, Keith G. Robertson-Turner a
écrit :
> Hello Stelian and anyone else reading.
> 
> I hope the dictum "there's no such thing as a stupid question" is well
> accepted on this list, because this may be the mother of all stupid
> questions. Err..
> 
> It's not absolutely clear from the manual, but does restore purge files
> that were deleted between incremental dumps?
> 
> E.g. If file foo.bar exists, then I do a level 0 dump, then I delete
> foo.bar, then I do a level 1 dump ... if I then wipe the filesystem and
> restore the level 0 dump then the level 1 dump in sequence, will foo.bar
> be removed (like "rsync --delete")?
> 
> The only info I could find was here:
> 
> http://www.searchstorage.com.au/topics/article.asp?DocID=1267195

Nice article.

> The info there suggests that dump stores a map of inodes deleted since
> the last dump in an array called "usedinomap". Does restore actually use
> that info when restoring incremental dumps,

Yes it does.

>  and if so - does it only do
> that if the "r" switch is used, as opposed to "x"?

It should work with either switches. The only difference between -r and
-x is that -r is optimized for speed since it knows that the entire dump
will be restored. -x needs to check the pathnames for filtering, so it
uses some slower algorithms.

> TIA.
> 
> PS: dump is still the best backup program, even after all these years.
> Amazing, isn't it? [waves to Linus].

This must be because real man do real backups after all :)

Thanks,

Stelian.
-- 
Stelian Pop <st...@po...>