how to check if the restored and original are the same

Thu Apr 20 13:55:56 UTC 2006

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:

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
> > 
> > 
> > Wesleyan Administration Services Ltd registered
> number 5188850 and Wesleyan Unit Trust Managers Ltd
> registered number 2114859 ("WUTM Ltd") are wholly
> owned subsidiary companies of Wesleyan Assurance
> Society, whose registered number is ZC145. WUTM Ltd
> is a member of IMA. For ISA/PEP/Unit Trusts
> Administration Centre: PO Box 9033, Chelmsford, SM99
> 2WQ Telephone: 0870 601 6129 Wesleyan Assurance
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> -- 
> Harry Hoffman
> Integrated Portable Solutions, LLC
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