Thank you! This helps, Barbara
On 09/04/08 13:40, Stephen Hahn wrote: > * Barbara.Lundquist at Sun.COM <Barbara.Lundquist at Sun.COM> [2008-09-04 > 20:23]: > >> On 09/04/08 12:14, Stephen Hahn wrote: >> >>> * [1]Barbara.Lundquist at sun.com [2]<Barbara.Lundquist at sun.com> >>> [2008-09-04 18:57]: >>> >>>> In this line from a sample Distro Constructor manifest, is this >>>> URL a repository or is this URL an authority. Is there a >>>> difference? >>>> >>>> <pkg_repo_default_authority> >>>> <main url=[3]"http://indiana-build.central:10000"; >>>> authname="example.com"/> >>>> <mirror url="" authname=""/> >>>> </pkg_repo_default_authority> >>>> >>>> I'm still struggling to differentiate between a repository and an >>>> authority. >>>> >>> In the above example, the authority is "example.com", the >>> packages from which are being served by the repository running at >>> port 10000 on indiana-build.central. >>> >>> A book analogy might be that my copy of "The Elements of Style >>> (illustrated)" was published by Penguin (authority) but was >>> purchased from/shipped by Amazon (repository). >>> >> I understand your book analogy below, but I am having trouble >> applying that analogy to this statement from Glenn Lagasse, where >> he's describing "default authority" and "default repository": >> >> Glenn states: >> >>> "It's both in this instance. You can have multiple repositories and only >>> one default authority (which is the default repository to pull packages >>> from). If you only have one repository, then it's automatically the >>> default authority." >>> >> Can you help me extend your analogy to help understand the terms >> "default authority" and "default repository"? >> > > Sure. Let's say there's two publishers, Penguin and Puffin. The > example gets contrived, in that we'll pretend that I can only buy > Penguin from Amazon and only Puffin from Borders. If I say that > Penguin is my *preferred* authority, then any order I might make for a > book with some title would be looked up in Penguin's catalog first, > and ordered from Amazon. If Penguin doesn't have that title, I'll > look in Puffin's--if they have it, then we'll order from Borders. > > If I have more than one non-preferred authority--if we had, say, > Springer's catalog, then I would iterate through all those catalogs > until giving up. > > The next step in the analogy is regarding mirrors: I can order from > Amazon, but my package contents could come from either their Fernley > NV center, or the one in Kansas, or the one in Tennessee. At present, > we contact the *origin* repository for the package metadata (the > "order"), but can contact any of the mirror repositories for contents. > > (There are a number of variant deployments that break or could break > the analogy: we could serve more than one authority from a single > repository (which I suppose is more like the real world), we could use > peer-to-peer transports or round-robin among mirrors--these are like > asking different sites for individual book pages and stitching them > together ourselves. That's what pkg(1) already does with multiple > mirrors, but that's not how I want my books to arrive. :) ) > > - Stephen > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://mail.opensolaris.org/pipermail/caiman-discuss/attachments/20080904/4cc45f25/attachment.html>
