Actually, I have to make a correction to my earlier statement... the
article I referred to was using bond mode 0 (bond-rr) and not mode 1 as
I had indicated.
I know mode 0 is not supported in the oVirt interface as one of the
official options (but can be specified under "custom") and probably is
not typically recommended, but if setup correctly, it seems it would be
perfect for the storage (and migration?) network/bonds?
-Alan
On 30/07/2015 10:41 PM, Patrick Russell wrote:
We just changed this up a little this week. We split our traffic into 2 bonds,
10GB mode 1 as follows:
Guest vlans, managment vlan (including some NFS storage) -> bond0
Migration layer 2 only vlan -> bond1
This allowed us to tweak the vdsm.conf to speed up migrations without impacting
management and guest traffic. As a result we’re currently pushing about 5Gb on
bond1 when we do live migrations between hosts.
-Patrick
On Jul 28, 2015, at 1:34 AM, Alan Murrell <li...@murrell.ca> wrote:
Hi Patrick,
On 27/07/2015 7:25 AM, Patrick Russell wrote:
We currently have all our nics in the same bond. So we have guest
traffic, management, and storage running over the same physical
nics, but different vlans.
Which bond mode do you use, out of curiousity? Not sure I would go to this
extreme, though; I would still want the physical isolation of Management vs.
network/VM traffic vs. storage, but just curious which bonding mode?
Modes 1 and 5 would seem to be the best ones, as far as maximising throughput.
I read an article just the other day where a guy detailed how he bonded four
1Gbit NICs in mode 1 (with each on a different VLAN) and was able to achieve
320MB/s throughput to NFS storage.
As far as the storage question, I like to put other storage on the network
(smaller NAS devices, maybe SANs for other storage) and would want the VMs to
be bale to get at those. Being to use a NIC to carry VM traffic for storage as
well as for host access to storage would cut down on the number of NICs I would
need to have in each node.
-Alan
-Alan
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