Re: RELEASE discs & ISO images (for future)

Hi Oliver Fromme! 

On Sat, 15 Mar 2008 10:04:40 +0100 (CET); Oliver Fromme wrote about 'Re: RELEASE discs & ISO images (for future)':

>>>    224655360   7.0-RELEASE-i386-livefs.iso
>>>     94493696   7.0-RELEASE-i386-livefs.iso.uzip (16k cluster)
>>>    110188032   7.0-RELEASE-i386-livefs.iso.uzip (2K cluster)
>>> 
>>> So the difference is 124 MB for 16K cluster size, and
>>> 109 MB for 2K cluster size (which is noticably faster
>>> during access).  Actually the space savings will be a
>>> bit less, because the /boot directory (about 30 MB)
>>> won't be compressed.  So the real gain is probably a
>>> little less than 100 MB in the 2K case.
>> 
>> By the way, the maxmum cluster size is 127k or 130048 with uzip,
>> if you want to maximize the compression ratio.
> That would make the live FS painfully slow, and it wouldn't
> make a big difference from the default (16K).
> It is already noticeably slow with the default cluster size
> of 16K on my test machine (a 1 GHz VIA C3), so would rather
> prefer to use 2K cluster size, even though compression will
> be not quite as good.  (2K is the minimum, less than that
> doesn't make sense for CD9660 media because the physical
> sector size is 2K.)

How much is slowdown from 2K to 16K ? I think it's not worth to loose in
compression ratio in 16K -> 2K, in opposit to 127K which will really gain
nothing, yes.

-- 
WBR, Vadim Goncharov. ICQ#166852181       mailto:vadim_nuclight_at_mail.ru
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