topic Re: Split files using tar in Operating System - HP-UX

Split files using tar

Karthik S S — Fri, 27 Feb 2004 04:36:01 GMT

Is there a way to split a larger file into multiple chunks using tar??

-Karthik S S

Re: Split files using tar

Mark Grant — Fri, 27 Feb 2004 04:43:24 GMT

Nope but you could use "split"

Re: Split files using tar

Jeff Schussele — Fri, 27 Feb 2004 04:44:57 GMT

Hi Karthik,

Or "csplit"

Jeff

Re: Split files using tar

Sanjay Kumar Suri — Fri, 27 Feb 2004 04:45:04 GMT

I have not come across.

tar xvf then split.

sks

Re: Split files using tar

Elmar P. Kolkman — Fri, 27 Feb 2004 04:46:29 GMT

GNU tar can do it, but the HP-UX version doesn't. You could use the split command in combination with tar. Or, a rather dirty solution, create a small lvol, the size you want the tar files to be, and tar to that lvol. When it is full, it will request a new 'tape', copy your data from the lvol to a file and continue the tar to the lvol.

(I haven't tried this, but it should work).

Re: Split files using tar

Lorenzo Facello — Fri, 27 Feb 2004 04:54:34 GMT

try to use tar and split commands together.
ex
tar xvf xxx.tar | split -b...

split recognizes the following command-line options and arguments:

-l line_count The input file is split into pieces line_count
lines in size.

-a suffix_length
suffix_length letters are used to form the suffix
of the output filenames. This option allows
creation of more than 676 output files. The
output file names created cannot exceed the
maximum file name length allowed in the directory
containing the files.

-b n The input file is split into pieces n bytes in
size.

-b nk The input file is split into pieces n x 1024 bytes
in size. No space separates the n from the k.

-b nm The input file is split into pieces n x 1048576
bytes in size. No space separates the n from the
m.

-n The input file is split into pieces n lines in
size. This option is obsolescent and is
equivalent to using the -l line_count option.

Re: Split files using tar

Elmar P. Kolkman — Fri, 27 Feb 2004 04:58:14 GMT

The example is wrong, the idea correct:
tar cf - | split ...

Re: Split files using tar

Umapathy S — Fri, 27 Feb 2004 05:07:20 GMT

Karthik,

The ideas are the same. You can tar and gzip the file. Then use split to split the files in whatever sizes you want.

split -bm

split -10m temp.tar.gz myfiles

This will create myfilesxa to myfilesx*.

You can regroup them using cat

cat myfilesxa myfilesxb myfilesxc >temp.tar.gz

HTH
Umapathy

Re: Split files using tar

Trond Eirik Aune — Fri, 27 Feb 2004 05:10:42 GMT

Of course, you could also just install rar on the server.

Re: Split files using tar

Karthik S S — Fri, 27 Feb 2004 05:12:04 GMT

Hi All,

Thanks .. I tried the following,

csplit -k hi.tar 70000 '{69999}'

(creates 4 files xx0*)

compare the size (doesn't match)

root@fep1:/depot/tartest>du -sk hi.tar xx0*
34660 hi.tar
6426 xx00
8526 xx01
9750 xx02
1374 xx03
root@fep1:/depot/tartest>bc
6426+8526+9750+1374
26076
quit

Am I missing something? Do I have to club these files using cat??

-Karthik S S

Re: Split files using tar

Karthik S S — Fri, 27 Feb 2004 05:14:58 GMT

Thank you Umapathy .. it works ..!!

Thanks,
Karthik S S