[CentOS-mirror] Download speed issues with us-msync.centos.org

Lance Albertson

lance at osuosl.org
Fri Aug 14 18:52:48 UTC 2020

On Fri, Aug 14, 2020 at 2:23 AM Fabian Arrotin <arrfab at centos.org> wrote:

> On 13/08/2020 18:34, Lance Albertson wrote:
> > This problem i still happening to this IP address and causing issues to
> > our downstream users since our sync is taking so long to complete. Is
> > there any update on this?
> >
> > Thanks!
> >
> Hi Lance,
> I had a look at our graphs for that node and on average on the last days
> it's pushing out at ~66Mbit/s with peaks to 585Mbits/s , so even
> connected over gbit these days.
> Wondering if that's a routing/peering issue from OSUOSL but I can
> confirm that it's happening from some locations in the US that I tested
> : seems capp'ed around ~500kbit/s ... while from another server in the
> US, I could get the following stats for the same file :
> 100%[=============================================================================>]
> 558,002,176 50.3MB/s   in 11s
> So clearly far better. :-)

It actually seems OK right now doing the test myself:
558,002,176 31.8MB/s   in 18s

> That's what I think that it's probably some peering issue. I currently
> don't have time to investigate that , but if that impacts you at that
> level (also bad luck to fall on that particular node while there are
> other in the same pool), can you investigate at your side with your
> provider, which routes, etc .. maybe that would help ?

Yeah, let me consult with our provider and see if they notice anything.
We've had problems with peering before impacting performance so it might be

PS: for the time being, I've just removed it from the msync.centos.org
> DNS pool, but node is still online and up2date and can be used for some
> tests.

Thank you for doing that! I'll let you know what we find out.

> Here is the file I tested :
> http://centosv4.centos.org/centos/8/BaseOS/x86_64/os/images/install.img
> --
> Fabian Arrotin
> The CentOS Project | https://www.centos.org
> gpg key: 17F3B7A1 | twitter: @arrfab
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Lance Albertson
Oregon State University | Open Source Lab
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