topic Re: compression in Operating System - HP-UX

compression

Fadia Almarei — Thu, 24 Jun 2004 01:39:20 GMT

Dear All

i do my tar backup on hard disk hich i 36GB, and i do te ackup for two files the bigger one is 30GB , and then when i do compress command on the file the disk become full before it finished compressing .
is there is any thing (patch) can i add to the tar command to compression and tar at the same time ???
BR,
Fadia

Re: compression

Naveej.K.A — Thu, 24 Jun 2004 01:49:07 GMT

hi fadia,

tar doesnt support files more than 2GB.
Look out for GNU TAR

regds
Naveej

Re: compression

Fadia Almarei — Thu, 24 Jun 2004 01:52:08 GMT

i know that , i do the tar for a folder which contain many files ,the size of all of these files less than 2GB , the tar file result from this is almost 30GB size , so i want to use the tar command with option to compress the files at the same time

Re: compression

Naveej.K.A — Thu, 24 Jun 2004 01:54:32 GMT

hi fadia,

GNU TAR will do it for you.

get it from
http://hpux.connect.org.uk/hppd/hpux/Gnu/tar-1.14/
and install it

with best wishes
Naveej

Re: compression

Mark Grant — Thu, 24 Jun 2004 02:07:45 GMT

You can do it in memory with something like

tar cf - | gzip > newfile.tgz

However, I'm not sure how much RAM you are going to use with these files of yours.

Re: compression

Fadia Almarei — Thu, 24 Jun 2004 02:11:41 GMT

Dear Mark
i try this but it gives me error that gzip not found.but i want to know is the file i put for gzip is a new file , if this is the case , i will hae a problem that i will have wo files one is from the tar and the other from the gzip. is is rigth or what

Re: compression

Shaikh Imran — Thu, 24 Jun 2004 02:15:08 GMT

Hi,
Do you have enough space on the disk/filesystem where you are compressing the file ?
Normally compressing a file requires atleast 50%-100% of the free space on disk/filesystem
depending upon the ratio of compression.

Regards,

Re: compression

Fadia Almarei — Thu, 24 Jun 2004 02:18:29 GMT

as i said the file disk i have is a free disk with 36GB , but when i do the tar for the first folder (which contain many files) the resulted tar file is 30GB.

Re: compression

Stuart Browne — Thu, 24 Jun 2004 02:32:56 GMT

The command Mark gave you would be the best one to use if 'gzip' is in your path.

If it's not, use the full path for 'gzip'.

If you don't have gzip (I find this very hard to believe), try using 'compress' in it's stead:

tar cf - | compress > newfile.tar.Z

The whole point of this (to make it a bit clearer) is to do the commands in a pipe. This means you aren't creating a 30GB intermediate file before you compress it, it's done as-you-go.

Your current issue is that your 36GB disk has 30GB used already for your 'tar' file, which means your compression doesn't have any worknig space to play with (depending on the compression program you use dpeends on how much space you need).

Pipes are good. Use them.

Re: compression

Franky_1 — Thu, 24 Jun 2004 02:35:33 GMT

Hi Fadia,

you could use

tar cfv - | gzip -9 >

This should tar and compress the files in one step

HTH

Franky

Re: compression

Sanjay Kumar Suri — Thu, 24 Jun 2004 02:40:13 GMT

There is no option in tar which does compression and backup simultaneously.

As previous post suggest, use the -z option in gzip to compress the backup.

sks

Re: compression

Michael Tully — Mon, 16 Sep 2024 09:26:43 GMT

You should be able to use gzip found in /usr/contrib/bin
Failing that you can download it from here. The usage of tar with the pipe through gzip is a very good method.

http://hpux.connect.org.uk/hppd/hpux/Gnu/gzip-1.3.5/

Re: compression

Fadia Almarei — Thu, 24 Jun 2004 06:08:57 GMT

Dear Sturt
just a small question when using this tar command
tar cf - | gzip > newfile.tgz
the files used is the files that i will do backup for or at which i will do the backup ,
and also as i have to do the backup for a directory contains many files can i replace it with the dirctory path

Re: compression

Franky_1 — Thu, 24 Jun 2004 07:41:52 GMT

Hi Fadia,

look at my reply and you'll see that you can do it with the directory.
Btw, would you mind assining points ?

Regards

Franky

Re: compression

Fadia Almarei — Thu, 24 Jun 2004 07:44:55 GMT

put i want to do the backup on disk , does any thing change ,and the question was is this the file that i want to do backup for or at

Re: compression

Franky_1 — Thu, 24 Jun 2004 08:05:40 GMT

Hi Fadia,

the files respectively the directory named after the tar command are / is the thing you want to backup
For example if you want to backup /tmp
then : tar cfv - /tmp|gzip ...

HTH

Franky

Re: compression

Fadia Almarei — Thu, 24 Jun 2004 08:23:10 GMT

Frank
i tried it but it does not work, what shull i do for that

Re: compression

Patrick Wallek — Thu, 24 Jun 2004 08:25:56 GMT

What exactly did you try? What error message are you getting? How is it not working? Please show the exact command you are trying.

Re: compression

Fadia Almarei — Thu, 24 Jun 2004 08:33:26 GMT

i do the backup for the directory without writing the file name at which tar cvf for and the error message is
"tar: usage tar [-]{txruc}[eONvVwAfblhm{op}][0-7[lmh]] [tapefile] [blocksize] [[
-C directory] file] ..."

the command i use is
" tar cvf /u01/oracle/oa11idata|/usr/contrib/bin/gzip > /u04/SAT-u01.tgz"

Re: compression

Mark Grant — Thu, 24 Jun 2004 08:36:28 GMT

You are missing the "-" character. Try

tar cvf - /u01/oracle/oa11idata|/usr/contrib/bin/gzip > /u04/SAT-u01.tgz