[OpenIndiana-discuss] [developer] Re: SPARC-OpenIndiana Screenshots
martin at martux.org
Mon Sep 10 13:10:40 UTC 2012
On Mon, Sep 10, 2012 at 3:02 PM, Sašo Kiselkov <skiselkov.ml at gmail.com> wrote:
> On 09/10/2012 02:49 PM, Martin Bochnig wrote:
>> I know, But on everything starting at 1GHz it is not that bad.
>> The reason was: Of course I'm aware of the smaller compression ratios.
>> But then DualLayer would be a requirement.
>> If you like and if time allows, I can offer two versions of that ISO.
>> One for DualLayer Media (with gzip-5) and the other for usual 4.7 GB
>> (4.4GB) media.
> Contrary to popular belief, the -[1-9] switch to gzip doesn't influence
> compression ratio all that much. Here are my tests with the silesia corpus:
> $ time gzip -1 -c < silesia.tar > silesia-1.tar.gz
> user 0m43.004s
> ratio 63.5%
> $ time gzip -3 -c < silesia.tar > silesia-3.tar.gz
> user 0m52.029s
> ratio 65.5%
> $ time gzip -5 -c < silesia.tar > silesia-5.tar.gz
> user 1m9.355s
> ratio 67.4%
> $ time gzip -6 -c < silesia.tar > silesia-6.tar.gz
> user 1m29.819s
> ratio 67.9%
> $ time gzip -9 -c < silesia.tar > silesia-9.tar.gz
> user 3m16.998s
> ratio 68.1%
> I hardly think the 2.5% difference in compression ratio is going to push
> you over the single-layer limit. By a first-degree approximation, 10GB
> will roughly compress like this:
> gzip -1: 3.64 GB
> gzip -3: 3.45 GB
> gzip -5: 3.26 GB
> gzip -6: 3.21 GB
> gzip -9: 3.19 GB
> So save yourself a ton of time and use something between gzip -3 or gzip
> -5. Anything higher than that is placebo.
Wow! That's interesting!
However, in case of the current stuff a 4.4GB DVD is 99% full.
So even 1MB too much is ... still too much.
Of course we could simply delete something that nobody wants to use on
such a LiveDVD.
Let's see what i/o compression of stuff inside the ramdisk brings.
And also I think that I put too much into the boot_archive.
First I give you this current instable stuff, let's say tomorry, really.
Then we can go ahead.
MUST first verify, if JDS really works again now.
My wish is, that you cleanly boot directly into JDS, rather than just
an xterm (from where you could start gnome-session yourself).
Will log off and be online again by tomrrow.
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