topic Re: cpio or tar in Operating System - HP-UX

cpio or tar

Rainer von Bongartz — Fri, 16 Aug 2002 08:56:10 GMT

I need to copy a couple of GIGS from one directory to another in a minimum time

From your experience which one will be faster? tar or cpio as shown below

tar -cf - .|(cd dstdir;tar -xpf )
find . | cpio -pudm dstdir

Regards
Rainer

Re: cpio or tar

Justo Exposito — Fri, 16 Aug 2002 09:01:13 GMT

Hi Rainer,

What about cp -R?

Regards,

Justo.

Re: cpio or tar

Ravi_8 — Fri, 16 Aug 2002 09:03:36 GMT

Hi Rainer.

I feel that tar is more fatser than cpio.

Re: cpio or tar

H.Merijn Brand (procura — Fri, 16 Aug 2002 09:06:24 GMT

From Bill Hassell's seminar we've learned that

# cd .../src
# find . | cpio -pudlmv .../dest

is by far the fastest and safest way

Check:

# find .../src | wc -l
# find .../dest | wc -l

should be the same

Thank's Bill :)

Re: cpio or tar

Jean-Luc Oudart — Fri, 16 Aug 2002 09:06:46 GMT

This can take sometimes for a few GIGS.
If the directories are within the same file system , this is even worse.

Personally I use cpio.
But if it's huge tranfer, I would backup to tape and restore to the new directory.

Jean-Luc

Re: cpio or tar

Judy Traynor — Fri, 16 Aug 2002 09:58:24 GMT

I recently did about 140 gigs with cpio
did only the following

cd /start_dir
find . -depth -print | cpio -pd /dest_dir

Threw it into a script (was replacing an array, and copied from /homexx to /newhomexx.

I found this to be efficient (make sure you do not use -v anywhere, and you will be fine.)

Re: cpio or tar

harry d brown jr — Fri, 16 Aug 2002 11:07:20 GMT

Rainer,

MIRROR it!!!!

Break the mirror and kabang you have a COPY!!!!!!

live free or die
harry

Re: cpio or tar

Darrell Allen — Fri, 16 Aug 2002 11:13:26 GMT

Hi Rainer,

I used tar until Bill Hassell pointed me towards cpio -pudlmv. It is indeed much faster.

I prefer to omit the "v" option because of the time it takes to display filenames on the screen.

Darrell