[Engine-devel] Network Quality of Service 3.3 - Feature design

[Ofri Masad]

Hi, 
answers inline

Thanks,
Ofri

----- Original Message -----
> From: "Itamar Heim" <iheim at redhat.com>
> To: "Ofri Masad" <omasad at redhat.com>
> Cc: "engine-devel" <engine-devel at ovirt.org>
> Sent: Sunday, June 2, 2013 10:34:47 AM
> Subject: Re: [Engine-devel] Network Quality of Service 3.3 - Feature design
> 
> On 06/02/2013 09:58 AM, Ofri Masad wrote:
> > Hi all,
> >
> > A new Feature page for "Network Quality of Service" feature was published.
> >
> > http://www.ovirt.org/Features/Design/Network_QoS
> >
> > You are more than welcome to share you thoughts and insights.
> >
> > Thanks,
> > Ofri.
> > _______________________________________________
> > Engine-devel mailing list
> > Engine-devel at ovirt.org
> > http://lists.ovirt.org/mailman/listinfo/engine-devel
> >
> 
> 
> some questions:
> 1. "In the Add/Edit Network two parts will be added - one for the QoS
> properties of the network, the other for the QoS properties preset for
> VNICs attached to the network."
> 
> so the first part of QoS for network is the limit of the logical network
> on the host for all vnic's associated to it, compared to other logical
> networks?

Exactly. first part is the network level limitation.

> 
> 2. "Only a user permitted to edit the network may edit the QoS
> properties in the network dialog or override the QoS properties in the
> VNIC dialog. "
> 
> why would a network operator (having permissions on networks) have
> permissions on specific VM's vnic's?
> probably a special permission to edit network QoS at vm level is needed?

True. we will limit the VNIC QoS editing to a user which holds both UserVmManager and NetworkAdmin permissions.
This also the case for editing port mirroring for vnic.   

> 
> 3. "outbound_burst 	Bigint "
> just wondering - what numbers do you expect here that Integer like the
> average and peak is not enough?
> 

the units for the "burst" parameter are Mb (Mega bits). so, if we would like to allow burst of over 4GB (Giga byte) we will need Bigint.   

> 4. "Old libvirt versions that have the global driver lock may have
> performance problems. It would be nice to check what version of libvirt
> is this going to run on"
> 
> old versions but 1.0.1 is required, does 1.0.1 have this issue?
> 

No. ver 1.0.1 does not have that problem. this sentence was left there by mistake and will be removed.  


> 5. behavior with provider networks (quantum)?

Traffic shaping using the Network QoS feature will be available only for oVirt networks at this stage.

> 
> Thanks,
>     Itamar
>