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List:       dragonfly-users
Subject:    Re: 7-Zip / Bzip2
From:       "Samuel J. Greear" <dragonflybsd () evilcode ! net>
Date:       2008-05-06 2:39:23
Message-ID: 481fc50e$0$869$415eb37d () crater_reader ! dragonflybsd ! org
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"Matthew Dillon" <dillon@apollo.backplane.com> wrote in message 
200805060047.m460lrhj094676@apollo.backplane.com">news:200805060047.m460lrhj094676@apollo.backplane.com...

> > Hi,
> > 
> > Posted this to kernel@ by accident, please reply here instead :)
> > 
> > I just wanted to know if there's any interest for the devs to add
> > something like p7zip to the base install; even if it's a simple fork
> > that only supports 7z.  While 7zip is about as obnoxiously slow as
> > bzip2, it usually gets much better compression.
> > 
> > That's not why I'm suggesting it though - what really gets me is that
> > bzip2 has no "list" option.  Does that 10 gb bzip2 backup archive
> > contain 100gb of data, or 200gb?  Other than dumping the entire
> > archive to /dev/null through wc, there's really no way to do it.  Gzip
> > will list files, but its compression ratio is awful.
> > 
> > I imagine that other OSes are going to be watching Dragonfly very
> > carefully in the next while as new the features (especially HAMMER)
> > mature.  Maybe adding 7z will get yet another bandwagon going and
> > there will be support across the board :)
> > 
> > Best Regards,
> > Ben Cadieux
> Well, I think not in base, at least not unless a lot of people
> are using it.  p7zip is readily available via the pkgsrc tree
> and that's the most reasonable method of accessibility for
> now.
> -Matt
> Matthew Dillon
> <dillon@backplane.com>
I do not know if DragonFly is actively tracking libarchive, but it seems
to be "the ticket" for implementing new archiving/compression methods
through a common mechanism. If one wanted to see 7z functionality
in base implementing a libarchive provider is probably the way to go.
I did a quick test at one point on the dfly distribution ISO and as I
recall 7z was ~60% the size of bzip2 using standard settings.
food+thought, etc.
Sam 


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