[Bug 446245] Re: lzma more efficient than gzip
My suggestion of comment #2 is now implemented. I have mentored Vitor Baptista in the Google Summer of Code 2010 exactly for this. He finished it today and I applied it to the openprinting-ppds and openprinting- ppds-extra packages in Maverick, saving near 30 MB in an installed system. I will do the same with HPLIP. ** Changed in: foomatic-db (Ubuntu) Status: Confirmed = Fix Released -- lzma more efficient than gzip https://bugs.launchpad.net/bugs/446245 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 446245] Re: lzma more efficient than gzip
Great. Thank Vitor and Till for your effort. -- lzma more efficient than gzip https://bugs.launchpad.net/bugs/446245 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 446245] Re: lzma more efficient than gzip
Maybe a driver cache would avoid cups to decompress each time. -- lzma more efficient than gzip https://bugs.launchpad.net/bugs/446245 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 446245] Re: lzma more efficient than gzip
Mike from Cups team replied to my request that LZMA as a format has also not been standardized like GZIP/Flate, so we'd want to make sure that issue is covered before we adopt it. -- lzma more efficient than gzip https://bugs.launchpad.net/bugs/446245 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 446245] Re: lzma more efficient than gzip
** Attachment added: BootDmesg.txt http://launchpadlibrarian.net/33292791/BootDmesg.txt ** Attachment added: Dependencies.txt http://launchpadlibrarian.net/33292792/Dependencies.txt ** Attachment added: Locale.txt http://launchpadlibrarian.net/33292793/Locale.txt ** Attachment added: Lspci.txt http://launchpadlibrarian.net/33292794/Lspci.txt ** Attachment added: PrintingPackages.txt http://launchpadlibrarian.net/33292795/PrintingPackages.txt ** Attachment added: ProcCpuinfo.txt http://launchpadlibrarian.net/33292796/ProcCpuinfo.txt ** Attachment added: ProcInterrupts.txt http://launchpadlibrarian.net/33292797/ProcInterrupts.txt ** Attachment added: ProcModules.txt http://launchpadlibrarian.net/33292798/ProcModules.txt ** Attachment added: UdevDb.txt http://launchpadlibrarian.net/33292799/UdevDb.txt ** Attachment added: UdevLog.txt http://launchpadlibrarian.net/33292800/UdevLog.txt -- lzma more efficient than gzip https://bugs.launchpad.net/bugs/446245 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 446245] Re: lzma more efficient than gzip
** Changed in: foomatic-db (Ubuntu) Importance: Undecided = Wishlist ** Changed in: foomatic-db (Ubuntu) Status: New = Confirmed -- lzma more efficient than gzip https://bugs.launchpad.net/bugs/446245 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 446245] Re: lzma more efficient than gzip
First, this is a feature request and therefore I have marked it Wishlist. As this feature request is not about the packaging and installation of foomatic-db but about its core functionality I recommend to report this upstream, in this case on http://buga.linuxfoundation.org/, for the product OpenPrinting and the component foomatic-db. The reason why we are using gzip compression for all PPDs (also in the printer driver packages) and not bz2 or lzma is that CUPS reads ready- made PPD files also if they are .gz-compressed but not if they are .bz2- or .lzma-compressed. Here you should post a feature request at http://www.cups.org/str.php asking for CUPS to support more modern compression formats for PPD files. Another approach which could be implemented in foomatic-db-engine is to supply a PPD generator in /usr/lib/cups/driver/ which simply uncompresses lzma-compressed PPDs when CUPS requests them. In this case one can even think about putting all PPDs into one big file (like .tar.lzma) as this compresses the files even further. When compressing all PPDs into one file one can very well make use of the similarity of PPDs for printers which are only slightly different (something like HP LaserJet 4100 and 4200 or so). One could divide the PPDs in groups of similar files and in ech group take a master PPD which gets included completely and add the rest as diffs to be applied to the master PPD. Naturally one completes it by lzma-ing the whole thing. Algorithms to genrate such a PPD package and quickly getting the desirted PPDs out of it would be an interesting student project on custom data compression techmologies. -- lzma more efficient than gzip https://bugs.launchpad.net/bugs/446245 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 446245] Re: lzma more efficient than gzip
Thanks for your feedback. I posted a feature request for lzma compression to the cups project: http://www.cups.org/str.php?L3369 For the PPD generator solution, I think that it is a kind of file system implementation with less performance since the PPD generator would have to read the whole tar archive in order to reach a driver file at the end of the archive. Moreover, it would make the cups system heavier and duplicate the file system feature. -- lzma more efficient than gzip https://bugs.launchpad.net/bugs/446245 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
