[CentOS] Weird bandwith behaviour (download throughput) on CentOS based gateway

hw hw at adminart.net
Mon Oct 9 13:05:51 UTC 2017


Jobst Schmalenbach <jobst at barrett.com.au> writes:

> On Thu, Oct 05, 2017 at 02:57:18PM +1300, Clint Dilks (clintd at scms.waikato.ac.nz) wrote:
>> On Thu, Oct 5, 2017 at 2:41 PM, Jobst Schmalenbach <jobst at barrett.com.au>
>> wrote:
>> [snip]
>> Hi,
>> 
>> Are you sure  that your issue  isn't related to the mirror that your
>> systems are selecting ?  If they are using different mirrors I would try
>> using the fastestmirror plugin to make the gateway select the same mirror
>> as you other host.
>
> Darn!!!!
>
> I should have included in the initial email that I actually ran EXTRA
> tests from a {local} CentOS mirror using wget after I figured there
> was some differences in the "yum update" times ...
>
> The Gateway:
>
>   [root at GATEWAY /tmp] #>wget http://mirror.internode.on.net/pub/centos/6.9/isos/x86_64/CentOS-6.9-x86_64-bin-DVD1.iso
>   --2017-10-05 14:59:55--  http://mirror.internode.on.net/pub/centos/6.9/isos/x86_64/CentOS-6.9-x86_64-bin-DVD1.iso
>   Resolving mirror.internode.on.net... 150.101.135.3
>   Connecting to mirror.internode.on.net|150.101.135.3|:80... connected.
>   HTTP request sent, awaiting response... 200 OK
>   Length: 3972005888 (3.7G) [application/octet-stream]
>   Saving to: “CentOS-6.9-x86_64-bin-DVD1.iso”
>   0% [                                                                              ] 4,454,198    680K/s
>
> One of the hosts behind it:
>
>   [root at piquet /tmp] #>wget http://mirror.internode.on.net/pub/centos/6.9/isos/x86_64/CentOS-6.9-x86_64-bin-DVD1.iso
>   --2017-10-05 15:01:32--  http://mirror.internode.on.net/pub/centos/6.9/isos/x86_64/CentOS-6.9-x86_64-bin-DVD1.iso
>   Resolving mirror.internode.on.net... 150.101.135.3
>   Connecting to mirror.internode.on.net|150.101.135.3|:80... connected.
>   HTTP request sent, awaiting response... 200 OK
>   Length: 3972005888 (3.7G) [application/octet-stream]
>   Saving to: `CentOS-6.9-x86_64-bin-DVD1.iso'
>   0% [                                                                              ] 13,616,730  2.4M/s

Is there a dependency on which machine you test first?  Perhaps the file
has been stored in some cache along the way and for the second test, it
can be delivered from the cache instead of from the source, which might
yield higher speeds.


-- 
"Didn't work" is an error.



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