[Libosinfo] RFC: Splitting off database into separate package

Daniel P. Berrange berrange at redhat.com
Fri Jul 24 10:23:06 UTC 2015


On Wed, Jul 22, 2015 at 11:46:23AM +0100, Daniel P. Berrange wrote:
>  - Is XML the format we want to use long term ?
> 
>    We already ditched XML for the PCI & USB ID databases, in favour of
>    directly loading the native data sources because XML was just too
>    damn slow to parse. I'm concerned that as we increase the size of
>    the database we might find this becoming a more general problem.
> 
>    So should we do experiments to see if something like JSON or YAML
>    is faster to load data from ?
> 
>    If we want to use a different format, should we do it exclusively
>    or in parallel
> 
>    eg should we drop XML support if we switch to JSON, or should
>    we keep XML support and automatically generate a JSON version
>    of the database.

FWIW, I used an online XML -> JSON convertor on fedora.xml.in to
see what the result looks like.

There are a few bits that are a bit crazy in the automated conversion,
particularly where the element only contains an "id" attribute, this
needlessly ends up as a nested dict, but it generally gives an idea
of what things would look like in a JSON world:

{
  "libosinfo": {
    "-version": "0.0.1",
    "os": [
      {
        "-id": "http://fedoraproject.org/fedora/1",
        "short-id": "fedora1",
        "_name": "Fedora Core 1",
        "version": "1",
        "_vendor": "Fedora Project",
        "family": "linux",
        "distro": "fedora",
        "codename": "Yarrow",
        "upgrades": { "-id": "http://redhat.com/rhl/9" },
        "derives-from": { "-id": "http://redhat.com/rhl/9" },
        "release-date": "2003-11-05",
        "eol-date": "2004-09-20",
        "devices": {
          "device": [
            { "-id": "http://pciids.sourceforge.net/v2.2/pci.ids/1b36/0100" },
            { "-id": "http://pciids.sourceforge.net/v2.2/pci.ids/8086/2415" }
          ]
        },
        "media": [
          {
            "-arch": "i686",
            "url": "http://archive.fedoraproject.org/pub/archive/fedora/linux/core/1/i386/iso/yarrow-i386-disc1.iso",
            "iso": {
              "application-id": "FC/1 i386",
              "system-id": "LINUX",
              "volume-size": "660340736"
            },
            "kernel": "isolinux/vmlinuz",
            "initrd": "isolinux/initrd.img"
          },
          {
            "-arch": "i686",
            "url": "http://archive.fedoraproject.org/pub/archive/fedora/linux/core/1/i386/iso/yarrow-i386-disc2.iso",
            "iso": {
              "application-id": "FC/1 i386",
              "system-id": "LINUX",
              "volume-size": "667516928"
            }
          },
          {
            "-arch": "i686",
            "url": "http://archive.fedoraproject.org/pub/archive/fedora/linux/core/1/i386/iso/yarrow-i386-disc3.iso",
            "iso": {
              "application-id": "FC/1 i386",
              "system-id": "LINUX",
              "volume-size": "645464064"
            }
          },
          {
            "-arch": "i686",
            "iso": {
              "application-id": "FC/1 i386",
              "system-id": "LINUX",
              "volume-size": "3963158528"
            }
          },
          {
            "-arch": "x86_64",
            "url": "http://archive.fedoraproject.org/pub/archive/fedora/linux/core/1/x86_64/iso/yarrow-x86_64-disc1.iso",
            "iso": {
              "application-id": "FC/1 x86_64",
              "system-id": "LINUX"
            },
            "kernel": "isolinux/vmlinuz",
            "initrd": "isolinux/initrd.img"
          }
        ],
        "tree": [
          {
            "-arch": "i686",
            "url": "http://archive.fedoraproject.org/pub/archive/fedora/linux/core/1/i386/os/",
            "kernel": "images/pxeboot/vmlinuz",
            "initrd": "images/pxeboot/initrd.img",
            "boot-iso": "images/boot.iso"
          },
          {
            "-arch": "x86_64",
            "url": "http://archive.fedoraproject.org/pub/archive/fedora/linux/core/1/x86_64/os/",
            "kernel": "images/pxeboot/vmlinuz",
            "initrd": "images/pxeboot/initrd.img",
            "boot-iso": "images/boot.iso"
          }
        ],
        "installer": {
          "script": { "-id": "http://fedoraproject.org/scripts/fedora/jeos" }
        }
      },
      {
        "-id": "http://fedoraproject.org/fedora/2",
        "short-id": "fedora2",
        "_name": "Fedora Core 2",
        "version": "2",
        "_vendor": "Fedora Project",
        "family": "linux",
        "distro": "fedora",
        "codename": "Tettnang",
        "upgrades": { "-id": "http://fedoraproject.org/fedora/1" },
        "derives-from": { "-id": "http://fedoraproject.org/fedora/1" },
        "release-date": "2004-05-18",
        "eol-date": "2005-04-11",
        "media": [
          {
            "-arch": "i686",
            "url": "http://archive.fedoraproject.org/pub/archive/fedora/linux/core/2/i386/iso/FC2-i386-disc1.iso",
            "iso": {
              "application-id": "FC/2 i386",
              "system-id": "LINUX",
              "volume-size": "667529216"
            },
            "kernel": "isolinux/vmlinuz",
            "initrd": "isolinux/initrd.img"
          },
          {
            "-arch": "i686",
            "url": "http://archive.fedoraproject.org/pub/archive/fedora/linux/core/2/i386/iso/FC2-i386-disc2.iso",
            "iso": {
              "application-id": "FC/2 i386",
              "system-id": "LINUX",
              "volume-size": "665802752"
            }
          },
          {
            "-arch": "i686",
            "url": "http://archive.fedoraproject.org/pub/archive/fedora/linux/core/2/i386/iso/FC2-i386-disc3.iso",
            "iso": {
              "application-id": "FC/2 i386",
              "system-id": "LINUX",
              "volume-size": "669016064"
            }
          },
          {
            "-arch": "i686",
            "url": "http://archive.fedoraproject.org/pub/archive/fedora/linux/core/2/i386/iso/FC2-i386-disc4.iso",
            "iso": {
              "application-id": "FC/2 i386",
              "system-id": "LINUX",
              "volume-size": "203737088"
            }
          },
          {
            "-arch": "i686",
            "url": "http://archive.fedoraproject.org/pub/archive/fedora/linux/core/2/i386/iso/FC2-i386-DVD.iso",
            "iso": {
              "application-id": "FC/2 i386",
              "system-id": "LINUX",
              "volume-size": "4370640896"
            }
          },
          {
            "-arch": "x86_64",
            "url": "http://archive.fedoraproject.org/pub/archive/fedora/linux/core/2/x86_64/iso/FC2-x86_64-disc1.iso",
            "iso": {
              "application-id": "FC/2 x86_64",
              "system-id": "LINUX",
              "volume-size": "668203008"
            },
            "kernel": "isolinux/vmlinuz",
            "initrd": "isolinux/initrd.img"
          },
          {
            "-arch": "x86_64",
            "url": "http://archive.fedoraproject.org/pub/archive/fedora/linux/core/2/x86_64/iso/FC2-x86_64-disc2.iso",
            "iso": {
              "application-id": "FC/2 x86_64",
              "system-id": "LINUX",
              "volume-size": "666394624"
            }
          },
          {
            "-arch": "x86_64",
            "url": "http://archive.fedoraproject.org/pub/archive/fedora/linux/core/2/x86_64/iso/FC2-x86_64-disc3.iso",
            "iso": {
              "application-id": "FC/2 x86_64",
              "system-id": "LINUX",
              "volume-size": "656420864"
            }
          },
          {
            "-arch": "x86_64",
            "url": "http://archive.fedoraproject.org/pub/archive/fedora/linux/core/2/x86_64/iso/FC2-x86_64-disc4.iso",
            "iso": {
              "application-id": "FC/2 x86_64",
              "system-id": "LINUX",
              "volume-size": "240547840"
            }
          },
          {
            "-arch": "x86_64",
            "url": "http://archive.fedoraproject.org/pub/archive/fedora/linux/core/2/x86_64/iso/FC2-x86_64-DVD.iso",
            "iso": {
              "application-id": "FC/2 x86_64",
              "system-id": "LINUX",
              "volume-size": "4273096704"
            },
            "kernel": "isolinux/vmlinuz",
            "initrd": "isolinux/initrd.img"
          }
        ],
        "tree": [
          {
            "-arch": "i686",
            "url": "http://archive.fedoraproject.org/pub/archive/fedora/linux/core/2/i386/os/",
            "kernel": "images/pxeboot/vmlinuz",
            "initrd": "images/pxeboot/initrd.img",
            "boot-iso": "images/boot.iso"
          },
          {
            "-arch": "x86_64",
            "url": "http://archive.fedoraproject.org/pub/archive/fedora/linux/core/2/x86_64/os/",
            "kernel": "images/pxeboot/vmlinuz",
            "initrd": "images/pxeboot/initrd.img",
            "boot-iso": "images/boot.iso"
          }
        ],
        "installer": {
          "script": { "-id": "http://fedoraproject.org/scripts/fedora/jeos" }
        }
      },
      {
        "-id": "http://fedoraproject.org/fedora/3",
        "short-id": "fedora3",
        "_name": "Fedora Core 3",
        "version": "3",
        "_vendor": "Fedora Project",
        "family": "linux",
        "distro": "fedora",
        "codename": "Heidelberg",
        "upgrades": { "-id": "http://fedoraproject.org/fedora/2" },
        "derives-from": { "-id": "http://fedoraproject.org/fedora/2" },
        "release-date": "2004-11-08",
        "eol-date": "2006-01-16",
        "media": [
          {
            "-arch": "i686",
            "url": "http://archive.fedoraproject.org/pub/archive/fedora/linux/core/3/i386/iso/FC3-i386-disc1.iso",
            "iso": {
              "application-id": "FC/3 i386",
              "system-id": "LINUX",
              "volume-size": "646987776"
            },
            "kernel": "isolinux/vmlinuz",
            "initrd": "isolinux/initrd.img"
          },
          {
            "-arch": "i686",
            "url": "http://archive.fedoraproject.org/pub/archive/fedora/linux/core/3/i386/iso/FC3-i386-disc2.iso",
            "iso": {
              "application-id": "FC/3 i386",
              "system-id": "LINUX",
              "volume-size": "668520448"
            }
          },
          {
            "-arch": "i686",
            "url": "http://archive.fedoraproject.org/pub/archive/fedora/linux/core/3/i386/iso/FC3-i386-disc3.iso",
            "iso": {
              "application-id": "FC/3 i386",
              "system-id": "LINUX",
              "volume-size": "667498496"
            }
          },
          {
            "-arch": "i686",
            "url": "http://archive.fedoraproject.org/pub/archive/fedora/linux/core/3/i386/iso/FC3-i386-disc4.iso",
            "iso": {
              "application-id": "FC/3 i386",
              "system-id": "LINUX",
              "volume-size": "404764672"
            }
          },
          {
            "-arch": "i686",
            "url": "http://archive.fedoraproject.org/pub/archive/fedora/linux/core/3/i386/iso/FC3-i386-DVD.iso",
            "iso": {
              "application-id": "FC/3 i386",
              "system-id": "LINUX",
              "volume-size": "2466410496"
            }
          },
          {
            "-arch": "x86_64",
            "url": "http://archive.fedoraproject.org/pub/archive/fedora/linux/core/3/x86_64/iso/FC3-x86_64-disc1.iso",
            "iso": {
              "application-id": "FC/3 x86_64",
              "system-id": "LINUX",
              "volume-size": "668137472"
            },
            "kernel": "isolinux/vmlinuz",
            "initrd": "isolinux/initrd.img"
          },
          {
            "-arch": "x86_64",
            "url": "http://archive.fedoraproject.org/pub/archive/fedora/linux/core/3/x86_64/iso/FC3-x86_64-disc2.iso",
            "iso": {
              "application-id": "FC/3 x86_64",
              "system-id": "LINUX",
              "volume-size": "669126656"
            }
          },
          {
            "-arch": "x86_64",
            "url": "http://archive.fedoraproject.org/pub/archive/fedora/linux/core/3/x86_64/iso/FC3-x86_64-disc3.iso",
            "iso": {
              "application-id": "FC/3 x86_64",
              "system-id": "LINUX",
              "volume-size": "668422144"
            }
          },
          {
            "-arch": "x86_64",
            "url": "http://archive.fedoraproject.org/pub/archive/fedora/linux/core/3/x86_64/iso/FC3-x86_64-disc4.iso",
            "iso": {
              "application-id": "FC/3 x86_64",
              "system-id": "LINUX",
              "volume-size": "634851328"
            }
          },
          {
            "-arch": "x86_64",
            "url": "http://archive.fedoraproject.org/pub/archive/fedora/linux/core/3/x86_64/iso/FC3-x86_64-DVD.iso",
            "iso": {
              "application-id": "FC/3 x86_64",
              "system-id": "LINUX",
              "volume-size": "2639267840"
            },
            "kernel": "isolinux/vmlinuz",
            "initrd": "isolinux/initrd.img"
          }
        ],
        "tree": [
          {
            "-arch": "i686",
            "url": "http://archive.fedoraproject.org/pub/archive/fedora/linux/core/3/i386/os/",
            "kernel": "images/pxeboot/vmlinuz",
            "initrd": "images/pxeboot/initrd.img",
            "boot-iso": "images/boot.iso"
          },
          {
            "-arch": "x86_64",
            "url": "http://archive.fedoraproject.org/pub/archive/fedora/linux/core/3/x86_64/os/",
            "kernel": "images/pxeboot/vmlinuz",
            "initrd": "images/pxeboot/initrd.img",
            "boot-iso": "images/boot.iso"
          }
        ],
        "installer": {
          "script": { "-id": "http://fedoraproject.org/scripts/fedora/jeos" }
        }
      },
      {
        "-id": "http://fedoraproject.org/fedora/4",
        "short-id": "fedora4",
        "_name": "Fedora Core 4",
        "version": "4",
        "_vendor": "Fedora Project",
        "family": "linux",
        "distro": "fedora",
        "codename": "Stentz",
        "upgrades": { "-id": "http://fedoraproject.org/fedora/3" },
        "derives-from": { "-id": "http://fedoraproject.org/fedora/3" },
        "release-date": "2005-06-13",
        "eol-date": "2006-08-07",
        "media": [
          {
            "-arch": "i686",
            "url": "http://archive.fedoraproject.org/pub/archive/fedora/linux/core/4/i386/iso/FC4-i386-disc1.iso",
            "iso": {
              "application-id": "FC/4 i386",
              "system-id": "LINUX",
              "volume-size": "665434112"
            },
            "kernel": "isolinux/vmlinuz",
            "initrd": "isolinux/initrd.img"
          },
          {
            "-arch": "i686",
            "url": "http://archive.fedoraproject.org/pub/archive/fedora/linux/core/4/i386/iso/FC4-i386-disc2.iso",
            "iso": {
              "application-id": "FC/4 i386",
              "system-id": "LINUX",
              "volume-size": "668708864"
            }
          },
          {
            "-arch": "i686",
            "url": "http://archive.fedoraproject.org/pub/archive/fedora/linux/core/4/i386/iso/FC4-i386-disc3.iso",
            "iso": {
              "application-id": "FC/4 i386",
              "system-id": "LINUX",
              "volume-size": "668954624"
            }
          },
          {
            "-arch": "i686",
            "url": "http://archive.fedoraproject.org/pub/archive/fedora/linux/core/4/i386/iso/FC4-i386-disc4.iso",
            "iso": {
              "application-id": "FC/4 i386",
              "system-id": "LINUX",
              "volume-size": "660512768"
            }
          },
          {
            "-arch": "i686",
            "url": "http://archive.fedoraproject.org/pub/archive/fedora/linux/core/4/i386/iso/FC4-i386-DVD.iso",
            "iso": {
              "application-id": "FC/4 i386",
              "system-id": "LINUX",
              "volume-size": "2750582784"
            }
          },
          {
            "-arch": "x86_64",
            "url": "http://archive.fedoraproject.org/pub/archive/fedora/linux/core/4/x86_64/iso/FC4-x86_64-disc1.iso",
            "iso": {
              "application-id": "FC/4 x86_64",
              "system-id": "LINUX",
              "volume-size": "668174336"
            },
            "kernel": "isolinux/vmlinuz",
            "initrd": "isolinux/initrd.img"
          },
          {
            "-arch": "x86_64",
            "url": "http://archive.fedoraproject.org/pub/archive/fedora/linux/core/4/x86_64/iso/FC4-x86_64-disc2.iso",
            "iso": {
              "application-id": "FC/4 x86_64",
              "system-id": "LINUX",
              "volume-size": "666898432"
            }
          },
          {
            "-arch": "x86_64",
            "url": "http://archive.fedoraproject.org/pub/archive/fedora/linux/core/4/x86_64/iso/FC4-x86_64-disc3.iso",
            "iso": {
              "application-id": "FC/4 x86_64",
              "system-id": "LINUX",
              "volume-size": "669458432"
            }
          },
          {
            "-arch": "x86_64",
            "url": "http://archive.fedoraproject.org/pub/archive/fedora/linux/core/4/x86_64/iso/FC4-x86_64-disc4.iso",
            "iso": {
              "application-id": "FC/4 x86_64",
              "system-id": "LINUX",
              "volume-size": "667107328"
            }
          },
          {
            "-arch": "x86_64",
            "url": "http://archive.fedoraproject.org/pub/archive/fedora/linux/core/4/x86_64/iso/FC4-x86_64-disc5.iso",
            "iso": {
              "application-id": "FC/4 x86_64",
              "system-id": "LINUX",
              "volume-size": "173809664"
            }
          },
          {
            "-arch": "x86_64",
            "url": "http://archive.fedoraproject.org/pub/archive/fedora/linux/core/4/x86_64/iso/FC4-x86_64-DVD.iso",
            "iso": {
              "application-id": "FC/4 x86_64",
              "system-id": "LINUX",
              "volume-size": "2932850688"
            },
            "kernel": "isolinux/vmlinuz",
            "initrd": "isolinux/initrd.img"
          },
          {
            "-arch": "ppc",
            "url": "http://archive.fedoraproject.org/pub/archive/fedora/linux/core/4/ppc/iso/FC4-ppc-disc1.iso",
            "iso": {
              "application-id": "FC/4 ppc",
              "system-id": "PPC",
              "volume-size": "661739520"
            },
            "kernel": "isolinux/vmlinuz",
            "initrd": "isolinux/initrd.img"
          },
          {
            "-arch": "ppc",
            "url": "http://archive.fedoraproject.org/pub/archive/fedora/linux/core/4/ppc/iso/FC4-ppc-disc2.iso",
            "iso": {
              "application-id": "FC/4 ppc",
              "system-id": "LINUX",
              "volume-size": "642336768"
            }
          },
          {
            "-arch": "ppc",
            "url": "http://archive.fedoraproject.org/pub/archive/fedora/linux/core/4/ppc/iso/FC4-ppc-disc3.iso",
            "iso": {
              "application-id": "FC/4 ppc",
              "system-id": "LINUX",
              "volume-size": "614821888"
            }
          },
          {
            "-arch": "ppc",
            "url": "http://archive.fedoraproject.org/pub/archive/fedora/linux/core/4/ppc/iso/FC4-ppc-disc4.iso",
            "iso": {
              "application-id": "FC/4 ppc",
              "system-id": "LINUX",
              "volume-size": "662865920"
            }
          },
          {
            "-arch": "ppc",
            "url": "http://archive.fedoraproject.org/pub/archive/fedora/linux/core/4/ppc/iso/FC4-ppc-disc5.iso",
            "iso": {
              "application-id": "FC/4 ppc",
              "system-id": "LINUX",
              "volume-size": "462649344"
            }
          },
          {
            "-arch": "ppc",
            "url": "http://archive.fedoraproject.org/pub/archive/fedora/linux/core/4/ppc/iso/FC4-ppc-DVD.iso",
            "iso": {
              "application-id": "FC/4 ppc",
              "system-id": "PPC",
              "volume-size": "3090690048"
            },
            "kernel": "isolinux/vmlinuz",
            "initrd": "isolinux/initrd.img"
          }
        ],
        "tree": [
          {
            "-arch": "i686",
            "url": "http://archive.fedoraproject.org/pub/archive/fedora/linux/core/4/i386/os/",
            "kernel": "images/pxeboot/vmlinuz",
            "initrd": "images/pxeboot/initrd.img",
            "boot-iso": "images/boot.iso"
          },
          {
            "-arch": "x86_64",
            "url": "http://archive.fedoraproject.org/pub/archive/fedora/linux/core/4/x86_64/os/",
            "kernel": "images/pxeboot/vmlinuz",
            "initrd": "images/pxeboot/initrd.img",
            "boot-iso": "images/boot.iso"
          }
        ],
        "installer": {
          "script": { "-id": "http://fedoraproject.org/scripts/fedora/jeos" }
        }
      },
      {
        "-id": "http://fedoraproject.org/fedora/5",
        "short-id": "fedora5",
        "_name": "Fedora Core 5",
        "version": "5",
        "_vendor": "Fedora Project",
        "family": "linux",
        "distro": "fedora",
        "codename": "Bordeaux",
        "upgrades": { "-id": "http://fedoraproject.org/fedora/4" },
        "derives-from": { "-id": "http://fedoraproject.org/fedora/4" },
        "release-date": "2006-03-20",
        "eol-date": "2007-07-02",
        "media": [
          {
            "-arch": "i686",
            "url": "http://archive.fedoraproject.org/pub/archive/fedora/linux/core/5/i386/iso/FC-5-i386-disc1.iso",
            "iso": {
              "application-id": "FC/5 i386",
              "system-id": "LINUX",
              "volume-size": "687235072"
            },
            "kernel": "isolinux/vmlinuz",
            "initrd": "isolinux/initrd.img"
          },
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    ]
  }
}


Regards,
Daniel
-- 
|: http://berrange.com      -o-    http://www.flickr.com/photos/dberrange/ :|
|: http://libvirt.org              -o-             http://virt-manager.org :|
|: http://autobuild.org       -o-         http://search.cpan.org/~danberr/ :|
|: http://entangle-photo.org       -o-       http://live.gnome.org/gtk-vnc :|




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