>________________________________ > From: Rob Weir <robw...@apache.org> >To: ooo-dev@incubator.apache.org >Sent: Saturday, April 7, 2012 12:14 PM >Subject: Re: [DL LOGIC] How to choose a mirror when more than 1 is available? > >On Sat, Apr 7, 2012 at 11:45 AM, Joe Schaefer <joe_schae...@yahoo.com> wrote: >> Not true re Apache mirror system scripting. While >> some people avoid the ezt templating involved in a typical >> download page by just using closer.cgi, the fact is >> that most projects use it successfully. For example >> see httpd's download page with links generated by the download >> script pointing directly at a mirror url. >> > >Joe -- your top-posting makes it a little unclear what you are >referring to. But if you are talking about a way to get a link >directly to a confirmed Apache mirror download rather than showing the >user an intermediate page, I'd love to hear more, a pointer to some >doc, etc.
I don't know where this is documented off the top of my head, but the best CMS-based example is opennlp.apache.org/cgi-bin/download.cgi There is a standard dowload cgi script in cgi-bin/download.cgi and a corresponding ezt template in content/download.mdtext. Just look it over and ask if you have any questions about how it works. (FTR the 'cd' in the script is no longer necessary). > >-Rob > >> >> >> >>>________________________________ >>> From: Rob Weir <robw...@apache.org> >>>To: ooo-dev@incubator.apache.org >>>Sent: Saturday, April 7, 2012 11:34 AM >>>Subject: Re: [DL LOGIC] How to choose a mirror when more than 1 is available? >>> >>>On Sat, Apr 7, 2012 at 10:13 AM, Marcus (OOo) <marcus.m...@wtnet.de> wrote: >>>> For our new release we will have a changed set of conditions: >>>> >>>> - new central mirror hosts for redirecting download requests >>>> - therefore also a new set of mirror server that host our builds >>>> - new set of supported platforms and languages >>>> - slighty changed file name schema >>>> >>>> To get this all under one hat, we have to improve the download logic that >>>> is >>>> currently done by JavaScript. >>>> >>>> To fulfill the first condition the download requests have to be split-up to >>>> more than 1 central mirror redirector. >>>> >>>> Here is a suggestion for choosing when (by random number) to redirect to >>>> which mirror: >>>> >>>> http://www.openoffice.org/download/test/index_new_dl.html >>>> >>>> Test results: >>>> - to make debugging easier I've included some screen output and comments >>>> - I've tested it locally with different combinations of active/inactive >>>> hosts and it works well >>>> - the fallback method works well, too >>>> - I've tested different percent values as ratio, but not yet for the >>>> 2nd case >>>> >>>> What do you think? >>>> >>> >>>The logic on the test pages works for me. >>> >>>But two additional complexities: >>> >>>1) MirrorBrain let's us link directly to a download file. We then >>>send the user to http://www.openoffice.org/download/contribute.html >>>while the file is downloading. But SourceForge and Apache mirror >>>systems take the user to a different page (not controlled by us). So >>>in those cases the user does not see the contribute.html page. >>> >>>Since the contribute.html page has very useful information for the >>>user, like links to the install instructions, information on support, >>>contributing to the project, etc., I think it is important that the >>>user sees this information in all paths. >>> >>>What could we do? Pop-up (or pop-under) a new HTML page? But that is >>>annoying to some users. >>> >>>The Apache and SF approaches both direct a user off of the >>>OpenOffice.org website, which is risky. >>> >>>2) What if we have more than three mirror systems? It sounds like you >>>prefer to keep MirrorBrain. That is fine with me. So maybe we have >>>Apache, SF and MirrorBrain? >>> >>>Imagine an array of mirror networks, each with weights, in sorted >>>order from smallest to largest. (or sort the array in code) >>> >>>Apache:1 >>>MirrorBrain:2 >>>SourceForge:3 >>> >>>TotalWeight = MirrorBrain + Apache + SourceForge == 6 >>> >>>x = rand() >>> >>>if (x < Apache/TotalWeight) >>> doApache() >>>else if (x < MirrorBrain/TotalWeight) >>> doMirrorBrain() >>>else >>> doSourceForge() >>> >>>Something like that. >>> >>>-Rob >>> >>>> Marcus >>>> >>> >>> >>> > > >
