Dan Widyono on 11 Aug 2005 02:24:39 -0000


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Re: [PLUG] grepmail + maildir


Chris' response made me curiouser and curiouser, until I couldn't stand it
and had to test myself.  I had an arbitrary sample of jpg, doc, pdf, txt,
etc.  Here are the unscientific results:

uncompressed:    3424937
individualbzip2: 3013001
tar-optj.bzip2:  3002399
tar-pipe.bzip2:  3002399
concatenated:    3000999

>From worst to best compression ratios (all around 12-12.4%):

bzip2 *
tar -cjf archive-pathname *
tar -cf - * | bzip2 -c > archive-pathname
cat * | bzip2 -c > archive-pathname

YMMV, especially with text.

Dan W.

On Mon, Aug 08, 2005 at 11:34:37PM -0500, Chris Cera wrote:
> > > Other than using more inodes, is there a big difference in space used
> > > just bzipping individual mail files instead of putting in an mbox and
> > > bzipping that?
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