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Fastest network setup for 10 Gbit

asked 2013-12-08 11:53:49 -0500

ffi gravatar image

We currently are running a default Grizzly setup on Debian and would like to utilize our 10 Gbit network. However, our instances only provide 500 Mbit. We suspect the GRE tunnels for this limitation.

Hence, we want to setup a Havanna installation and are in search for the fastest network topology for our private single tenant cloud. Nova-network or Neutron? If Neutron, which driver/plug-in to choose (Tunneling, VLAN,...)?

Is FlatDHCP in multi-host mode with nova-network a good idea?

Is it even possible to get 10 Gbit without SR-IOV/PCI-passthrough?

Thanks in advance

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I'm curious if you have compared your vm-to-vm transfer speeds with bare-metal to bare-metal? I can't remember the exact numbers, but I previously did this on a bonded 10gb network. There was a difference, but it ended up being rather negligible.

jtopjian gravatar imagejtopjian ( 2013-12-13 01:23:56 -0500 )edit

Bare-metal to bare-metal is about 9.4 Gbit without tunings. If it was negligble at your side, which netwerk setup do you have? Are you using nova network or neutron? I tested the VM-to-VM speed with SR-IOV: 8.3 Gbit without tunings. However, SR-IOV implicates manual configuring eth1 in VMs. :(

ffi gravatar imageffi ( 2013-12-13 02:34:14 -0500 )edit

Actually my results were reverse: I was unable to get noticeably better transfers on bare-metal than vm. I can't remember the rates, but it was <1gb. I was able to have several parallel transfers at that speed, though. I was not using SR-IOV. I was using VlanManager, btw.

jtopjian gravatar imagejtopjian ( 2013-12-13 09:22:04 -0500 )edit

3 answers

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answered 2016-09-26 23:06:45 -0500

Don gravatar image

Have you looked at OVS via DPDK? This is what we will do when we deploy.

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answered 2016-09-28 19:18:27 -0500

VSR gravatar image

for max VM Network IO performance you should be looking @ SRIOV.

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answered 2016-09-12 12:46:14 -0500

ospz2014 gravatar image

I am in this situation, and my VM is performing at half the BW than hypervisor host .. I am @ juno

i am using RPCTEST to test the things out

i can update on dumpxml of the VM if needed .. I checked web for network tuning or how Can I be able to match BW with physical ..

How did you deal with above situation ?

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Asked: 2013-12-08 11:53:49 -0500

Seen: 380 times

Last updated: Sep 28 '16