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From: Led <led@ukr-fin.com.ua>
To: ALT Linux Sisyphus discussion list <sisyphus@altlinux.ru>
Subject: Re: [sisyphus] Re: ppmd
Date: Wed, 21 Sep 2005 12:49:41 +0300
Message-ID: <200509211249.42077.led@ukr-fin.com.ua> (raw)
In-Reply-To: <m3y85qaig8.fsf@mrkooll.tdr.pibhe.com>

В сообщении от Среда 21 Сентябрь 2005 12:17 Maxim Tyurin написал(a):
> Alexey Tourbin writes:
> > On Tue, Sep 20, 2005 at 12:07:15PM +0300, Maxim Tyurin wrote:
> >> > Эта штука *зверски* жмёт текстовые файлы.
> >> >
> >> > $ du -hs dump.old
> >> > 350M    dump.old
> >> > $ gzip -9 <dump.old >dump.gz
> >> > $ du -hs dump.gz
> >> > 31M     dump.gz
> >> > $ bzip2 <dump.old >dump.bz2
> >> > $ du -hs dump.bz2
> >> > 21M     dump.bz2
> >> > $ ppmd e -s -o16 -m256 dump.old
> >> > $ du -hs dump.pmd
> >> > 14M     dump.pmd
> >> > $
> >>
> >> А если
> >> $ rzip -9 -o dump.rz dump.old
> >> $ du - hs dump.rz
> >> ?
> >
> > 25M     dump.rz
>
> Спасибо. Только как-то странно что bzip2 обошел rzip.
> Не должно так быть ИМХО.
> Может просто файлик маловат?
> mrkooll@mrkooll ~/DVD >  du -hs ALTLinux-Community
> 629M    ALTLinux-Community
> mrkooll@mrkooll ~/DVD >  bzip2 -v9 < ALTLinux-Community >
> ALTLinux-Community.bz2 (stdin):  7.767:1,  1.030 bits/byte, 87.12% saved,
> 659492155 in, 84913589 out. mrkooll@mrkooll ~/DVD >  du -hs
> ALTLinux-Community.bz2
> 81M     ALTLinux-Community.bz2
> mrkooll@mrkooll ~/DVD >  rzip -9 -o ALTLinux-Community.rz
> ALTLinux-Community ALTLinux-Community - compression ratio 8.662
> mrkooll@mrkooll ~/DVD >  du -hs ALTLinux-Community.rz
> 73M     ALTLinux-Community.rz

7za (p7zip) с указанием алгоритма PPMd жмёт лучше, чем ppmd (возможно потому, 
что в 7zip можно указать максимальный "model order" 32, а не 16)

Led.

Led.


  reply	other threads:[~2005-09-21  9:49 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-09-19 20:07 [sisyphus] I: Sisyphus-20050920 packages: +18! +65 (4802) Alexey M. Tourbin
2005-09-19 21:03 ` [sisyphus] dosfstools-2.11-alt4 Dmitry V. Levin
2005-09-19 21:42 ` [sisyphus] ppmd Alexey Tourbin
2005-09-20  4:55   ` Andrey Rahmatullin
2005-09-20  9:44     ` [sisyphus] ppmd Alexey Tourbin
2005-09-20  9:07   ` [sisyphus] ppmd Maxim Tyurin
2005-09-20  9:57     ` [sisyphus] ppmd Alexey Tourbin
2005-09-21  9:17       ` Maxim Tyurin
2005-09-21  9:49         ` Led [this message]
2005-09-20  3:08 ` [sisyphus] I: Sisyphus-20050920 packages: +18! +65 (4802) php-coder
2005-09-20  9:19   ` [sisyphus] [JT] idea %fix Michael Shigorin
2005-09-20 22:19     ` [sisyphus] [JT] idea %fix [JT] Vitaly Lipatov
2005-09-20 22:31       ` [sisyphus] " Alexey Tourbin
2005-09-22 12:46   ` [sisyphus] I: Sisyphus-20050920 packages: +18! +65 (4802) henker
2005-09-22 12:57     ` Led
2005-09-22 14:43       ` [JT] " Alexander Kubatkin
2005-09-23  7:35       ` [sisyphus] [JT] " Michael Shigorin
2005-09-23  7:44         ` Serge Polkovnikov
2005-09-23  9:12           ` Led
2005-09-22 13:01     ` [sisyphus] " Andrey Rahmatullin
2005-09-22 14:30       ` henker
2005-09-23  7:35     ` [sisyphus] [JT] " Michael Shigorin
2005-09-20  9:16 ` [sisyphus] fatresize Michael Shigorin

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