thanks everyone for the useful information.
regards
cheng
--- Bill Medland <billmedland@xxxxxxxxxxxxxxxx> wrote:
> 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@xxxxxxxxxx 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@xxxxxxxxxxxxxxxx>
> 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@xxxxxxxxxxx]
> > > >> Sent: 20 April 2006 13:57
> > > >> To: redhat-list@xxxxxxxxxx
> > > >> 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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