Re: [OSM-talk] LZMA planets

2008-01-01 Thread Karl Newman 
On Jan 1, 2008 7:19 AM, Martijn van Oosterhout [EMAIL PROTECTED] wrote:
 On Jan 1, 2008 3:47 PM, Bruce Cowan [EMAIL PROTECTED] wrote:
  I remember 7-Zip planets being provided in the past, what was the reason
  for removing them?

 Nobody used them. (With a handful rounded down to nobody)

 One major issue is that people don't decompress the planet anymre, but
 instead work on the compressed version directly. This means you need
 libraries to read/write them programmatically. Does lzma have such a
 library? Most scripts in SVN can handle GZ and BZ2 files direcly, but
 who is volunteering to fix all the scripts to work with 7z?

 Also, every linux system has bz2, but barely any have 7z, and I doubt
 people are going to install a new compression program for just saving
 a few bytes and losing a lot of functionality.

 Have a nice day,
 --
 Martijn van Oosterhout [EMAIL PROTECTED] http://svana.org/kleptog/

If some of the main tools such as Osmosis and/or JOSM were extended to
use it, it might get more use. I'm sure there's some open-source 7z
Java library somewhere, similar to the bz2 library already used in
Osmosis. Then it could be used without requiring client machines to
install new tools. A 33% savings over bz2 is significant, but the
tripled compression time might be an issue.

Karl

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Re: [OSM-talk] LZMA planets

2008-01-01 Thread Tom Hughes 
In message [EMAIL PROTECTED]
  Bruce Cowan [EMAIL PROTECTED] wrote:

 I remember 7-Zip planets being provided in the past, what was the reason
 for removing them?

Basically because nobody used them (most people look at a .7z file
and wonder what on earth it is as far as I can tell).

That and the the fact that it took forever to generate. The bzip one
is bad enough, 7zip was worse. For a full planet the time is measured
in hours, not minutes.

Tom

-- 
Tom Hughes ([EMAIL PROTECTED])
http://www.compton.nu/

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