[Openstack] Network speed issue

Adrián Norte Fernández adrian at bashlines.com
Tue Dec 16 19:37:12 UTC 2014


Read the names carefully again :)
I was suggesting what I used to do in the past when on a new OpenStack
install I had this problem.
El 16/12/2014 20:35, "Rick Jones" <rick.jones2 at hp.com> escribió:

> On 12/16/2014 11:28 AM, Adrián Norte Fernández wrote:
>
>> I use Neutron so..
>>
>
> I thought you said you were using Nova legacy networking:
>
>  In my OpenStack installation (Icehouse and use nova legacy networking)
>>
>
> In any event what I am suggesting is you install either netperf or iperf
> into both of the VMs and run a "pure" networking benchmark between them.
> That way you do not have to worry about anything like the 4GB file transfer
> filling the destination VM's file cache and then getting stuck behind slow
> flushing out to storage, or any concerns with the encryption overhead in
> scp etc. etc.
>
> If you install netperf into the two VMs, I can talk you through the
> process of how to run some of the more "interesting" tests.
>
> rick
>
>
>> El 16/12/2014 20:27, "Rick Jones" <rick.jones2 at hp.com
>> <mailto:rick.jones2 at hp.com>> escribió:
>>
>>     On 12/16/2014 11:09 AM, Georgios Dimitrakakis wrote:
>>
>>         Changing
>>
>>         gso on
>>         tso on
>>         gro off
>>
>>
>>         got me back to the initial status.
>>
>>
>>         Although now it starts with approximately 65-70MB/s  for a few
>>         seconds
>>         but then it drops down to 30MB/s
>>
>>
>>     What do you see if you use a "pure" networking benchmark such as
>>     netperf or iperf?
>>
>>     rick jones
>>
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>
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