On Wed, May 14, 2014 at 12:53 PM, Roy Bamford wrote:
> What about not compressing files smaller than the filesysem block size
> at all. In my case its 4k. Any file gets allocated 4k on disc anyway,
> so compression/decompression is just a waste of resource for files
> <=4k.
>
> I'm not suggestin
On 2014.05.12 10:35, Tom Wijsman wrote:
> On Sun, 11 May 2014 19:46:50 +0200
> Michał Górny wrote:
>
> > Rationale: xz-utils is quite widespread nowadays and it is a part
> > of @system set. It can achieve better compression ratio than bzip2,
> > and faster decompression at the same time.
>
> So
> On Wed, 14 May 2014, Andreas K Huettel wrote:
> However, I'm not so happy with a "semi-random" compres/dont compress
> decision for other files. Maybe some program expects a certain
> filename to display a README? If there is a clear-cut decision, then
> the code can be adapted, but if the p
Am Dienstag, 13. Mai 2014, 15:42:11 schrieb Ulrich Mueller:
>
> Compression for very small files was systematically studied by vapier
> in bug 169260, which led to the current threshold of 128 bytes. Files
> smaller than that "usually don't compress at all".
>
As long as this concerns manpages (
On 05/13/14 13:01, Andrew Savchenko wrote:
> f we are trying to consider a majority of users (and thus to
> select reasonable defaults), from disk usage + decompression
> overhead point of view it will be the best to store compressed files
> if they are at least one filesystem block smaller than or
On 12 May 2014 21:35, Tom Wijsman wrote:
> What about putting multiple doc / man / info files in a single .xz file
> for each package?
>
How would one use them if they're installed as a single .xz file per
package?
Is there a trick that exists to allow this to even work for "man man" ?
I'm gu
On Tue, 13 May 2014 08:18:25 -0400 Rich Freeman wrote:
> On Tue, May 13, 2014 at 7:01 AM, Andrew Savchenko wrote:
> >
> > If we are trying to consider all possible cases, some filesystems
> > may benefit even from compression of very small files (e.g. from
> > 140 to 100 bytes) due to packing of m
On Tue, 13 May 2014 06:08:52 +0400
Andrew Savchenko wrote:
> 1. How tools like man or info are supposed to work with such
> bundle? They are not expecting to have multiple man/info files into
> single xz bundle.
Hmm, true; they would need to be adapted, which involves talking to
upstream. Benchm
> On Tue, 13 May 2014, Rich Freeman wrote:
> Btrfs also supports file inlining, so every byte saved on small files
> does actually help (I believe the data structure that stores the
> inlined data doesn't have a fixed record size). Then again, btrfs
> also supports lzo compression and I belie
On Tue, May 13, 2014 at 7:01 AM, Andrew Savchenko wrote:
>
> If we are trying to consider all possible cases, some filesystems
> may benefit even from compression of very small files (e.g. from
> 140 to 100 bytes) due to packing of multiple small files in the
> same inode. ReiserFS is a good examp
On Tue, 13 May 2014 07:55:56 +0200 Ulrich Mueller wrote:
> > On Tue, 13 May 2014, Andrew Savchenko wrote:
>
> > Please consider that by default du shows block size, not byte size.
> > Than means that if file is actually 1234 bytes large, without -b it
> > will be still accounted for 4096 bytes
> On Tue, 13 May 2014, Andrew Savchenko wrote:
> Please consider that by default du shows block size, not byte size.
> Than means that if file is actually 1234 bytes large, without -b it
> will be still accounted for 4096 bytes on 4K-block filesystem.
This raises another question, namely if f
Hello,
On Mon, 12 May 2014 14:47:36 +0400 Alexander Tsoy wrote:
> В Sun, 11 May 2014 18:26:32 -0500
> Gordon Pettey пишет:
>
> > A lot of small files (e.g. AUTHORS, ChangeLog
> >
> > FWIW: On my system, I have 59M of bz2 files in /usr/share/man and
> > /usr/share/doc. A short script to decompre
On Mon, 12 May 2014 11:35:00 +0200 Tom Wijsman wrote:
> On Sun, 11 May 2014 19:46:50 +0200
> Michał Górny wrote:
>
> > Rationale: xz-utils is quite widespread nowadays and it is a
> > part of @system set. It can achieve better compression ratio
> > than bzip2, and faster decompression at the same
On Mon, May 12, 2014 at 5:47 AM, Alexander Tsoy wrote:
> В Sun, 11 May 2014 18:26:32 -0500
> Gordon Pettey пишет:
>
> > A lot of small files (e.g. AUTHORS, ChangeLog
> >
> > FWIW: On my system, I have 59M of bz2 files in /usr/share/man and
> > /usr/share/doc. A short script to decompress those a
В Mon, 12 May 2014 14:17:11 +0200
Tom Wijsman пишет:
> On Mon, 12 May 2014 14:47:36 +0400
> Alexander Tsoy wrote:
>
> > Here is my test results. xz options: "--lzma2=preset=6e,dict=4MiB".
> > Larger dictionary size does not improve compression ratio, I get
> > even worse results with just "-6e"
On Mon, 12 May 2014 14:47:36 +0400
Alexander Tsoy wrote:
> Here is my test results. xz options: "--lzma2=preset=6e,dict=4MiB".
> Larger dictionary size does not improve compression ratio, I get
> even worse results with just "-6e" or "-9e". man-bz2 is a full copy of
> my /usr/share/man, man-xz is
В Mon, 12 May 2014 14:47:36 +0400
Alexander Tsoy пишет:
> В Sun, 11 May 2014 18:26:32 -0500
> Gordon Pettey пишет:
>
> > A lot of small files (e.g. AUTHORS, ChangeLog
> >
> > FWIW: On my system, I have 59M of bz2 files in /usr/share/man and
> > /usr/share/doc. A short script to decompress thos
В Sun, 11 May 2014 18:26:32 -0500
Gordon Pettey пишет:
> A lot of small files (e.g. AUTHORS, ChangeLog
>
> FWIW: On my system, I have 59M of bz2 files in /usr/share/man and
> /usr/share/doc. A short script to decompress those and recompress with xz
> -6e reduced that to 36M.
Very strange o_O
On Mon, 12 May 2014 11:31:45 +0200
Marcin Mirosław wrote:
> Imho there is no real advantages to change current compressor for man
> files.
It's insufficient to experiment on a single file to make such claim,
you may very well found a file that works equally well with multiple
compression algorit
On Sun, 11 May 2014 19:46:50 +0200
Michał Górny wrote:
> Rationale: xz-utils is quite widespread nowadays and it is a part
> of @system set. It can achieve better compression ratio than bzip2,
> and faster decompression at the same time.
Some thoughts:
What about putting multiple doc / man / in
W dniu 11.05.2014 23:27, Pacho Ramos pisze:
> El dom, 11-05-2014 a las 19:46 +0200, Michał Górny escribió:
>> Hello, developers.
>>
>> I'd like to raise the following item for discussion: making .xz
>> the default compressor used by portage for documentation, man pages
>> and info files. That is, t
On 11/05/14 20:46, Michał Górny wrote:
> Hello, developers.
>
> I'd like to raise the following item for discussion: making .xz
> the default compressor used by portage for documentation, man pages
> and info files. That is, the equivalent of:
>
> PORTAGE_COMPRESS=xz
>
> in make.globals.
>
>
I
A lot of small files (e.g. AUTHORS, ChangeLog
FWIW: On my system, I have 59M of bz2 files in /usr/share/man and
/usr/share/doc. A short script to decompress those and recompress with xz
-6e reduced that to 36M. I don't have a comparison for individual file
differences.
I posted the short bash scr
El dom, 11-05-2014 a las 19:46 +0200, Michał Górny escribió:
> Hello, developers.
>
> I'd like to raise the following item for discussion: making .xz
> the default compressor used by portage for documentation, man pages
> and info files. That is, the equivalent of:
>
> PORTAGE_COMPRESS=xz
>
>
В Sun, 11 May 2014 19:46:50 +0200
Michał Górny пишет:
> Hello, developers.
>
> I'd like to raise the following item for discussion: making .xz
> the default compressor used by portage for documentation, man pages
> and info files. That is, the equivalent of:
>
> PORTAGE_COMPRESS=xz
>
> in ma
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