On Tue, Nov 30, 1999 at 12:50:40PM +0000, Minh Van wrote:
> does tar/gzip do 'incremented' compression or does it compress the file
> before deleting it ? ie. if i had a 150 mb file, it would require about
> another 100 mbs of free space to compress it before deleting the 150 mb
> file ?
>
> or does tar/gzip compress 1 mb, delete 1 mb, compress the next megabyte
> and delete the megabyte being compressed simultaneously ? i've yet to see
> a compression program that can compress a 150 mb file and delete the
> compressed component at the same time, because i don't want to end up
> having up to 200 - 250 mbs of drive space used after compression (ie. 150
> of original file, and 50 - 100 mbs of archive after compression.)
tar never removes its source files (well.. without --remove-files at
least)
"tar zcf file.tar.gz" is equivalent to "tar cf - | gzip >
file.tar.gz". ie: it does the gzip as the tar is generated, without an
intermediate file
gzip on a file by itself keeps the original around until the
compression is completed
--
- Gus
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