topic Re: make tar archives muti volume...? in Operating System - Linux

make tar archives muti volume...?

jackfiled — Fri, 28 Nov 2003 20:40:14 GMT

Hi all
I want to make tar archive file.
Created tar file limited specified size

for example
In sub dir size is 3072MB, tar created files are 1535MB each

How can execute that command?

Re: make tar archives muti volume...?

Huc_1 — Sat, 29 Nov 2003 02:21:43 GMT

In the gnu tar man page there is an -M qualifier this creates a multi volum tape !

I have never tryed such a long tar file myself but always have belief this did the trick ?

Have you tryed this ?

J-P

Re: make tar archives muti volume...?

Michael Schulte zur Sur — Sat, 29 Nov 2003 05:38:26 GMT

Hi,

just curious. Is it because of limitted space on disk, that you want to split it? If not make the tar file one file and then split it using split or so.

greetings,

Michael

Re: make tar archives muti volume...?

Thomas Vollmer — Sun, 30 Nov 2003 03:41:36 GMT

Hi,maybe You can give split-tar a try. It can create standalone tar's at the given size.You can find it under http://www.informatik-vollmer.de/software/split-tarThomasPS: I'm not related to JÃ¼rgen Vollmer in any kind ;

Re: make tar archives muti volume...?

jackfiled — Mon, 01 Dec 2003 01:01:38 GMT

-M options
How it applied..?
I can not find example.

Re: make tar archives muti volume...?

Thierry Poels_1 — Mon, 01 Dec 2003 02:31:28 GMT

hi,

more complex, but does work:

mknod /tmp/mypipe p
split -b1M - /dir/mytar < /tmp/mypipe &
tar cvf /tmp/mypipe /dir/files
rm /tmp/mypipe

to restore:
cat /dir/mytar* | tar xvf -

adjust the size parameter in the split commands to your needs (set at 1MB in this example).

regards,
Thierry.

Re: make tar archives muti volume...?

Mark Grant — Mon, 01 Dec 2003 05:39:49 GMT

Jackfiled,

Huc is talking about GNU tar. This tar doesn't come with HPUX. You will need to install it first. You can then use the "-M" option.

You can get GNU tar here.

http://hpux.connect.org.uk/hppd/hpux/Gnu/tar-1.13.25/

Re: make tar archives muti volume...?

Huc_1 — Mon, 01 Dec 2003 06:49:29 GMT

Ah did not understand this to be a HP-UX question ... as this is linux forum... but Yes do as mark suggest if this posible for you !

Thank, mark

J-P

Re: make tar archives muti volume...?

Mark Grant — Mon, 01 Dec 2003 08:32:14 GMT

Actually Huc, I think I got it wrong :)

This is in the linux forum but my head was in the HP-UX forum!

Re: make tar archives muti volume...?

jackfiled — Mon, 01 Dec 2003 20:09:53 GMT

thank you for your reply my problem..
I really appreciate that. ^^

Re: make tar archives muti volume...?

Stuart Browne — Mon, 01 Dec 2003 21:38:10 GMT

the '-M' in GNU tar is mainly for going to media.

i.e. tar cvMf /dev/fd0 list/of/files

This will automatically split across the diffent media volumes as required, prompting you to insert the next one.

If wanting to use a fixed sized file, then you have to couple it with the '-L' flag, to say how big you want them to get.

i.e. tar cvMLf 3072 /path/to/out.tar path/to/files

However, as you aren't changing 'media' between volume changes, you will probably have to create a script to pass to the '-F' flag to move the individual files into something different.

i.e. tar cvMLFf 3072 /tmp/move.script /tmp/out.tar path/to/files

--- /tmp/move.script ---
#!/bin/bash
VAL=1
until [ ! -f /tmp/out.tar.${VAL} ]
do
VAL=$((VAL + 1))
done
mv /tmp/out.tar /tmp/out.tar.${VAL}
--- /tmp/move.script ---

This will leave you to move the last file to the appropriate number of course.

Anyway.. Some fun for you..

Hope this helps.