Nic Bonding - throughput for guest

Nic Bonding - throughput for guest

[Stefan Bauer]

Hi,

 
please CC me - I'm not subscribed to this list.

 
I'm looking  forward to bond the 2 Nics from my KVM Host (2 x 1GbE) to increase throughput for my guest.

 
Currently my guest has a e1000 nic attached.

 
Do i have to tune anything else so my kvm guest can operate with 2 x 1gbit (to different clients) ?

 
I'm using 802.1d with hash_policy layer3+4 for bonding (this is tested and working with our switches).

 
Kind Regards.

 
Stefan

Re: Nic Bonding - throughput for guest

[Brian Jackson]

On Friday, October 24, 2014 02:37:28 PM Stefan Bauer wrote:
> Hi,
> 
>  
> please CC me - I'm not subscribed to this list.
> 
>  
> I'm looking  forward to bond the 2 Nics from my KVM Host (2 x 1GbE) to
> increase throughput for my guest.
> 
>  
> Currently my guest has a e1000 nic attached.


That probably won't cut it. You'll want to go with virtio-net and vhost.


> 
>  
> Do i have to tune anything else so my kvm guest can operate with 2 x 1gbit
> (to different clients) ?


Nope. Just use a standard bridge. The reported speed in the guest really has 
nothing to do with the actual achievable speed. I've seen close to 20gbit/sec 
guest to host with virtio+vhost.


> 
>  
> I'm using 802.1d with hash_policy layer3+4 for bonding (this is tested and
> working with our switches).


Most network setups I've seen required pretty specific traffic patterns to 
actually get >1gbit speed. i.e. you're unlikely to get >1gbit between 2 hosts. 
You're going to need multiple hosts in the mix to get it to work.


> 
>  
> Kind Regards.
> 
>  
> Stefan
> --
> To unsubscribe from this list: send the line "unsubscribe kvm" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html