topic Re: Tar files bigger than original directory. in Operating System - HP-UX

Tar files bigger than original directory.

faze — Tue, 28 Mar 2006 03:13:03 GMT

Hi

It seem like the tar file bigger than the original directory sizes. My tar files size=2GB but my directory only 900mb in total. This does look right. doesn't it?

Re: Tar files bigger than original directory.

Muthukumar_5 — Tue, 28 Mar 2006 03:15:13 GMT

What you are getting for this?

a) du -ks /directory

how did you use tar command execution?

--
Muthu

Re: Tar files bigger than original directory.

faze — Tue, 28 Mar 2006 03:20:44 GMT

Hello,

I'm getting:

$ du -sk
951574 /app/ldap/5.2

Re: Tar files bigger than original directory.

Muthukumar_5 — Tue, 28 Mar 2006 03:30:08 GMT

$ du -sk
951574 /app/ldap/5.2

>>>

~ 930 MB. Ok. Try this,

$ tar -cvf /tmp/trial.tar /app/ldap/5.2
$ du -ks /tmp/trial.tar

what are you getting now?

--
Muthu

Re: Tar files bigger than original directory.

V. Nyga — Tue, 28 Mar 2006 03:47:34 GMT

Hi,

it seems like you wrote your tar file in the same directory, that you wanted to tar.
So the tar command added the comlete tar file to your tar file.
So you've a file with the double size.
Look for the same name inside the tar file.
You can check it with 'tar tvf '

HTH
Volkmar

Re: Tar files bigger than original directory.

Antonio Cardoso_1 — Tue, 28 Mar 2006 03:56:52 GMT

Hi,

what options do you use in your tar command?
If using -h option (follow links) and the source directory contains links, this could explain differences.

find -type f

to look for links

antonio.

Re: Tar files bigger than original directory.

Peter Godron — Tue, 28 Mar 2006 03:58:38 GMT

faze,
I would agree with Antonio's analysis.

The tar command would not back up its own tar output file.
A list of files to be backed up is obtained before the tar starts.

I have done a very quick check with tar and the logical links would be backed up.

Re: Tar files bigger than original directory.

Radhakrishnan Venkatara — Tue, 28 Mar 2006 04:08:10 GMT

No it will add the tar file also into the archive. Tar used in SUN will be handled wisely it won't add it. But HP adds it.It is tested.

Re: Tar files bigger than original directory.

V. Nyga — Tue, 28 Mar 2006 04:26:52 GMT

Thanks Radhakrishnan :-)

I've enough experience with my own users and also external users sending me such tar files.
Of course it can also be a backup of links.
The best would be faze tells us which command in which directory he used.

Peace
V.

Re: Tar files bigger than original directory.

Peter Godron — Tue, 28 Mar 2006 04:32:16 GMT

log of my tar test:
# cd test
# ll
total 0
# touch file1
# touch file2
# ll
total 0
-rw-rw-rw- 1 root sys 0 Mar 28 10:33 file1
-rw-rw-rw- 1 root sys 0 Mar 28 10:33 file2
# tar -cvf x.tar *
a file1 0 blocks
a file2 0 blocks
# tar -tvf x.tar
rw-rw-rw- 0/3 0 Mar 28 10:33 2006 file1
rw-rw-rw- 0/3 0 Mar 28 10:33 2006 file2
# ll
total 32
-rw-rw-rw- 1 root sys 0 Mar 28 10:33 file1
-rw-rw-rw- 1 root sys 0 Mar 28 10:33 file2
-rw-rw-rw- 1 root sys 10240 Mar 28 10:33 x.tar

Seems x.tar was not backed up into x.tar