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Question gzip Maven Jean-loup Gailly
Jean-loup Gailly is the author of gzip and, now, CTO for Mandrakesoft, purveyors of Linux-Mandrake. Jean-loup's home page tells you quite a bit about him, including some interesting peeks into his life beyond Linux and open source software. Please try to keep it down to one question per post. Submitted questions will be chosen from the highest-moderated. Answers will appear within the next week.
When is gzip going to provide (transparent) support for bzip2 files and the Burrows-Wheeler algorithm?
Will BW be an algorithm option within the gzip file format itself ever?
However, much of the software you've written has started gathering a few grey hairs. Gzip, for example, has been at 1.2.4 for many, many moons, and looks about ready to collect it's gold watch.
Is compression software in a category that inherently plateus quickly, so that significant further work simply isn't possible? Or is there some other reason, such as Real Life(tm) intruding and preventing any substantial development?
(I noticed, for example, a patch for >4Gb files for gzip, which could have been rolled into the master sources to make a 1.2.5. This hasn't happened.)
It's a small world and it smells funny; I'd buy another if it wasn't for the money; Take back what I paid (SoM)
I noticed that you allowed the people who make the Winzip product to incorporate code written for Gzip. I think it's cool that you did that, because it would be horrible if winzip couldn't handle the gzip format, but at the same time, what are your thoughts about allowing free software code to be included in closed-source products?
Just out of curiosity, (tell me it's none of my business if you want to and I'll be OK with that) did you receive a licensure fee from the company that makes Winzip for the code?
-- Truth goes out the door when rumor comes innuendo. -- Groucho Marx
The field of compression has been thronged with patents for a long time - but patents at least reveal the algorithm.
What do you think of the expansion of trade-secret algorithms (MP3 quantisation tables, Sorensen, RealAudio and RealVideo, Microsoft Streaming Media) where the format of the data stream is not documented anywhere?
Tom
The compression world has many patents, notably for Lempel-Ziv compression as used in GIF. What is your view on companies patenting non-obvious algorithms for such processes as data compression?
11.0010010000111111011010101000100010000101101000
I am a happy owner of The Data Compression Book (2nd Ed). With the increasing availability of compression routines within libraries (Java's GZIP streams spring to mind), does this make your book a little unnecessary?
Should software authors continue to write their own compression routines, or simply trust the versions available to them in library form?
I can see some definite advantages to library code, i.e. the ability to upgrade routines, and having standardized algorithms which can be read by any program which utilizes the library.
Doug
Venn ist das nurnstuck git und Slotermeyer? Ya! Beigerhund das oder die Flipperwaldt gersput!
As we all know, at first Mandrake was little more than a repackaged version of RedHat. That's changed a bit with the newer versions. My question is this: to what degree will Mandrake continue to differ from RedHat and will there ever be a "developer" version (i.e. one that is centered towards those who are a bit more technically competant)?
Brad Johnson
--We are the Music Makers, and we
are the Dreamers of Dreams
Brad Johnson