[Users] Gluster network info

[Dan Kenigsberg]

On Thu, Oct 03, 2013 at 12:44:14PM +0300, Livnat Peer wrote:
> Hi Gianluca,
> 
> <snip>
> 
> On 10/02/2013 08:52 PM, Itamar Heim wrote:
> > On 09/28/2013 08:33 PM, Gianluca Cecchi wrote:
> >> Hello,
> >> I remember in the past that could be a problem to have high usage of
> >> ovirtmgmt network because engine sometimes detects hosts as
> >> unresponsive.
> >> And it should this the reason about bandwith limitation on vm
> >> migration, until dedicated network for it has been released.
> 
> We have a dedicated migration network in oVirt 3.3, which means all the
> migration network is using a dedicated network and not the management
> network.
> The caveat is that we still did not add support for capping it's bandwidth.
> The problem you detailed above can be bypassed by configuring the
> migration network on a dedicated interface.
> 
> >> SO the question is : what about ovirtmgmt network for gluster
> >> replication when gluster domain is provided by ovirt nodes?
> >> I suppose it could be a problem too, couldn't it?
> 
> yes that is correct, using ovirtmgmt for non management traffic is not a
> good idea.
> 
> >> In case I have a dedicated network for gluster for the nodes, how can
> >> i configure it?
> 
> Generally there two ways to go about this:
> 
> 1. add a new network role 'gluster replication' and then adjust the
> engine code to pass the network with this role as parameter to the
> replication verb in VDSM.
> 
> 2. in the replication verb in the UI let the user choose which network
> to use for the replication.
> 
> I am not familiar with the replication verb so I might be missing
> something but otherwise I think that solution 2 is more simple and less
> invasive then requiring a new network role.

Bala, is there a means to select, for each node, which IP address is to
be used for replication? AFAICT we use the host fqdn, which most
probably resolves to the ovirtmgmt device.

> 
> >> Can I configure in this case Gluster storage domain from ovirt engine
> >> or does it require to be on this network too?
> >>
> >> Thanks in advance for any suggestion
> >>
> >> Gianluca
> >> _______________________________________________
> >> Users mailing list
> >> Users at ovirt.org
> >> http://lists.ovirt.org/mailman/listinfo/users
> >>
> > 
> > livnat - would network QoS cover this?
> 
> Network Qos is needed in addition to what I have specified above. and it
> would be available in oVirt 3.4 hopefully, but if you use a dedicated
> network as suggested above you can bypass the traffic shaping issue by
> using a dedicated NIC.
> 
> 
> Livnat
> 
> > vijay/sahina - does it make sense to define a 'gluster replication
> > network' or something like that?
> 
> 
> 
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