[Interest] Poor mirror performance for the online Qt SDK

Sze Howe Koh szehowe.koh at gmail.com
Fri Dec 20 01:51:04 CET 2013

Hello Tuukka,

What I'm trying to say is, there could be users out there who have
difficulty downloading Qt because they get assigned an underperforming
mirror. Are there plans to let users override their assigned mirror in the
online SDK installer, for cases like this?

In my case, the system assigns me http://mirrors.hust.edu.cn/ which gave me
~15 KiB/s AND they disconnect after a few minutes. In contrast,
http://mirrors.ustc.edu.cn/ gave me ~200 KiB/s reliably. (Alternative
mirror found from from


On 19 December 2013 07:24, Turunen Tuukka <Tuukka.Turunen at digia.com> wrote:

>  If the local mirror in Australia has not synced the content you are
> loading, the system tries to find the next best one.
>  Yours,
>  Tuukka
>     *From: *Sze Howe Koh
> *Sent: *torstaina 19. joulukuuta 2013 0.05
> *To: *interest at qt-project.org
> *Subject: *[Interest] Poor mirror performance for the online Qt SDK
>  Hello,
> I'm finding the Online installer for unusable for downloading Qt
> 5.2.0. When I select "Package Manager", it takes over 5 minutes to
> complete the "Retrieving component information from remote
> repository..." stage. When I start the download, it crawls at an
> average of 15 KiB/s, and then the connection is lost:
> "Could not download archive:
> http://download.qt-project.org/online/qtsdkrepository/windows_x86/desktop/qt5/qt.520.win64_msvc2012_64_opengl.essentials/5.2.0msvc2012_64_opengl_essentials.7z
> : Connection closed"
> I tried a few times over the span of a week, with the same outcome each
> time.
> I entered this URL into Google Chrome, which showed me that I get
> redirected to
> http://mirrors.hust.edu.cn/qtproject/online/qtsdkrepository/windows_x86/desktop/qt5/qt.520.win64_msvc2012_64_opengl.essentials/5.2.0msvc2012_64_opengl_essentials.7z
> .
> The browser download also crawls at ~15 KiB/s. When I used a download
> accelerator to fetch the file from mirrors.hust.edu.cn, I'm able to
> achieve download speeds of 250 KiB/s (more than 16x faster).
> 1) I'm wondering if anyone else is experiencing issues with this
> mirror? I live in Australia, if that matters.
> 2) I know I can use the offline installer instead, but is there a way
> to get the online installer to pick a different mirror?
> Regards,
> Sze-Howe
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