[mirror-admin] Slow download speeds from dl.fedoraproject.org

[Stephen John Smoogen]

Thanks. I have looked and the server is running fine and could do
another rsync with no trouble. I did see that the route to get to your
server is a completely different one from what you included:

 7. 209.132.181.98
                                                            0.0%   101
   4.2   1.1   0.7   4.6   0.8
 8. 209.132.181.163
                                                            0.0%   101
   0.7   2.6   0.6  21.3   3.9
 9. te0-0-1-0.nr11.b019174-0.phx02.atlas.cogentco.com
                                                            0.0%   101
   5.7   1.6   1.1   5.7   0.7
10. 154.24.18.25
                                                            0.0%   101
   2.0   2.8   1.8   8.3   1.2
11. te0-4-0-5.ccr21.phx02.atlas.cogentco.com
                                                            0.0%   101
   2.0   3.1   1.8   8.9   1.4
12. be2931.ccr21.lax01.atlas.cogentco.com
                                                            0.0%   101
  15.6  14.5  13.2  21.4   1.4
13. be2964.ccr41.lax04.atlas.cogentco.com
                                                            0.0%   101
  13.6  14.5  13.4  19.3   1.2
14. level3.lax04.atlas.cogentco.com
                                                            0.0%   101
  14.0  15.0  13.0  52.7   5.3
15. ae-3-3.car1.Dublin1.Level3.net
                                                            0.0%   101
 218.7 212.2 180.3 399.2  62.0
16. HEANET-LIMI.car1.Dublin.Level3.net
                                                            0.0%   101
 179.2 177.5 175.5 180.6   1.1
17. te5-1-blanch-sr1.services.hea.net
                                                            0.0%   101
 176.2 177.4 176.2 183.2   1.6
18. rsyncer.ftp.heanet.ie
                                                            1.0%   101
 176.0 176.3 175.9 180.3   0.6

So do we have mismatched routing going on?


On 26 August 2016 at 11:08, Rob Gallagher <robert.gallagher at heanet.ie> wrote:
> Hi Stephen,
>
> There's actually an rsync running at the moment which is exhibiting the
> slowness issue, the sync is happening from from dl03 (209.132.181.25),
> and it's showing speeds around 100kB/s. We're connecting from
> 193.1.219.88.
>
> rg
>
> On Fri, 26 Aug 2016 10:43:14 -0400
> Stephen John Smoogen <smooge at gmail.com> wrote:
>
>> On 26 August 2016 at 07:21, Rob Gallagher
>> <robert.gallagher at heanet.ie> wrote:
>> > Hi Stephen,
>> >
>> > On Thu, 25 Aug 2016 13:17:33 -0400
>> > Stephen John Smoogen <smooge at gmail.com> wrote:
>> >
>> >> OK the load average on the servers is a bit up but the NFS
>> >> throughput looks about normal.. so I am not sure what is causing
>> >> it yet. I will investigate more on my side.
>> >>
>> >> Could you look on your side for the following:
>> >> 1) Can you give us an mtr from your host to dl05.fedoraproject.org
>> >> (it is one of the dl servers). Run for about 10 minutes.
>> >> 2) Do this again while doing an rsync. Send us both at the end of
>> >> those runs. 3) Can you try doing an rsync from the various dl
>> >> servers to see if there is one which is slow
>> >>
>> >
>> > Thanks for looking into it, I'm attaching an mtr to dl05 with a 10
>> > minute run, along with one when rsync is running.
>> >
>>
>> I like how to get to the UK from ireland it takes 180 ms but it takes
>> 150ms to get to the US after going through there.. ICMP flow control
>> is wonderful :). (Or Brexit affects packets.. take your pick).
>>
>> > A log of rsyncs from the 5 servers in the dl.fedoraproject.org
>> > rotation is also attached.
>> >
>>
>> OK dl01 and dl02 seem to be the problem ones in your check. I will
>> look them over and see what is up. Could you try dl04 for a bit and
>> see if you have a better set of runs?
>>
>> >>
>> >> ms round trip time has little bearing anymore in bandwidth
>> >> issues :(. You can have an mid-stream which is throttling you down
>> >> for some reason (they don't think the next guy is paying them
>> >> enough) or you can have a bad cable somewhere which pings
>> >> perfectly nicely but stops up.
>> >
>> > Yeah I didn't think so, we provide internet access for the majority
>> > of academic institutions in Ireland, so our connectivity is usually
>> > pretty good :)
>> >
>> > rg
>> >
>> > --
>> > Rob Gallagher | Public Key: 0x841386E3
>> >
>> > HEAnet Limited, Ireland's Education and Research Network
>> > 1st Floor, 5 George's Dock, IFSC, Dublin D01 X8N7
>> > Registered in Ireland, no 275301
>> > ☎ (+353-1) 6609040 WWW: http://www.heanet.ie/
>> >
>>
>>
>>
>
>
> --
> Rob Gallagher | Public Key: 0x841386E3
>
> HEAnet Limited, Ireland's Education and Research Network
> 1st Floor, 5 George's Dock, IFSC, Dublin D01 X8N7
> Registered in Ireland, no 275301
> ☎ (+353-1) 6609040 WWW: http://www.heanet.ie/
>



-- 
Stephen J Smoogen.

--