how to check if the restored and original are the same

[Bill Medland]

On April 20, 2006 06:55 am, Miner, Jonathan W (CSC) (US SSA) 
wrote:
> Careful using md5sum... You're going to update all the access
> times on all the files, if you do any storage management
> stuff, you're suddenly going to see that all of your files
> just got accessed.
>
> Having said that... here is a script that "should" do it:

Alternatively build the list of md5sums from the source directory 
and then use md5sum -c --status to check it.  Then you can later 
check the integrity of the backup even if the source no longer 
exists.  (Actually what I do is I generate the md5sum list 
before doing the copy, sitting it at the root of the tree).

>
> src={your source directory}
> cpy=(the copied directory}
>
> cd $src
> find . -type f -print | while read f; do
>   if [ `md5sum $src/$f $cpy/$f | cut -d' ' -f1 | uniq | wc -l`
> == 2 ]; then echo "ERROR: $f differs"
>   fi
> done
>
>
> -----Original Message-----
> From:	redhat-list-bounces at redhat.com on behalf of zhicheng
> wang Sent:	Thu 04/20/2006 09:35 AM
> To:	General Red Hat Linux discussion list
> Cc:
> Subject:	Re: how to check if the restored and original are the
> same thanks. this was what i was thinking. but we have tera
> bytes of data.
>
> even for testing, we need to test at least 200GB of
> data. how do i do that using md5sum for millions of
> files?
>
> cheng
>
> --- Harry Hoffman <hhoffman at ip-solutions.net> wrote:
> > You're probably better doing a md5sum of all of the
> > files and then
> > diff'ing that.
> >
> > This will you'll know if a file's content has
> > changed instead of just
> > whether the file is in both places.
> >
> > Cheers,
> > Harry
> >
> > Lunt, Nick wrote:
> > >> -----Original Message-----
> > >> From: zhicheng wang [mailto:wang_zc at yahoo.co.uk]
> > >> Sent: 20 April 2006 13:57
> > >> To: redhat-list at redhat.com
> > >> Subject: how to check if the restored and
> >
> > original are the same
> >
> > >> Dear all
> > >>
> > >> does anyone know how to verify if two directories
> >
> > are
> >
> > >> the same:
> > >
> > > Theres probably better methods but how about this
> > >
> > > ls -lR /dir1 > /tmp/dir1.out
> > > ls -lR /dir2 > /tmp/dir2.out
> > > diff /tmp/dir1.out /tmp/dir2.out
> > >
> > >
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-- 
Bill Medland
mailto:billmedland at mercuryspeed.com
http://webhome.idirect.com/~kbmed