[TAG] need information about sylpheed-claws

[Jason Creighton]

On Thu, 14 Apr 2005 23:19:32 -0600, 
"Benjamin A. Okopnik" <ben at linuxgazette.net> wrote:

> On Thu, Apr 14, 2005 at 03:23:05PM -0600, Jason Creighton wrote:
> > No special options were passed to either compressor, so this is the
> > defaults. I'm currently compressing a terabyte of nothing with bzip2.
> > This will probably take a couple days, so I'll report back my findings.
> > As if anybody cares. :-)
> 
> Oh, I do! I'd really appreciate it if you'd send me a copy. Something
> about the idea of this very tightly-coiled 500-mile-long spring (ready
> to explode into a tangled mess of metal spaghetti if you poke it)
> quietly living on my system *really* appeals to me. :)

Here's the sizes for terabyte (2^30 bytes, not a trillion bytes)
bzip2'd:

``
~/prog/compression$ ls -l terabyte.*
-rw-r--r--  1 jason users 766574 Apr 17 23:10 terabyte.bz2
-rw-r--r--  1 jason users    238 Apr 18 09:12 terabyte.bz2.bz2
-rw-r--r--  1 jason users    324 Apr 18 09:12 terabyte.bz2.bz2.bz2
~/prog/compression$ 
''

Again, it looks like two passes is the optimal for bzip2 when dealing
with weird data like this. I didn't try gziping because the resulting
file would be about a gig, but it occurs to me I could do two-pass
compression on the fly:

``
~/prog/compression$ dd if=/dev/zero bs=1M count=1048576 | gzip | gzip > terabyte.gz.gz
''

...so I'll have some figures on gziped data soon. <grin>

Anyway, since you request it, I'll send you a copy of it.
terabyte.bz2.bz2 is so small I'm tempted to attach it to this email, but
I'm afraid that someone on this list might have some sort of AV setup
that would die on something like this.

Jason Creighton