[Interest] Poor mirror performance for the online Qt SDK

Jenssen Tim Tim.Jenssen at digia.com
Fri Dec 20 09:05:53 CET 2013

In the past it was very easy to set a different url on the server:

> To set a different repository on the installer: just go to "Settings" after you started the
> installer then click on tab "Repositories". There you can disable the default repository
> and add your better connected server for example 
> http://mirrors.ustc.edu.cn/qtproject/online/qtsdkrepository/windows_x86/root/qt/ .
> Then you can check the url with clicking "Test" if no error is be shown then everything is ok.
> After that you can continue with installing as usual.

But if I look closer to the current used method I see that the root Updates.xml contains again the general download.* url. So we need some more manual work to change the download server. (Big sorry for that and I created a task: https://bugreports.qt-project.org/browse/QTIFW-441)
The installer can read repositories from local so we can download the root/qt directory to hard disk (yes you need all files in that directory) and change/adjust the urls in the Updates.xml file. I did that in the attachment for the mirrors.ustc.edu.cn and windows repository.
Then use the path to that local root install repository with the faster download urls as the new user repository url in the installer settings - don't forget to disable the default one.
After that you can continue with installing as usual.

Note: The find fastest server algorithm needs to be fixed and the best would be to create a bugreport with some more collected infos - so we can get an idea why and where this happens and how we can fix that.

PS: Resume download feature for the installers is already a task: watch and vote https://bugreports.qt-project.org/browse/QTIFW-5
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