[Engine-devel] watchdog

Thu Apr 11 12:54:16 UTC 2013

Hi,

It is not really an optimization based only on console connection. In my opinion this should be a decision factor when determining which VM to migrate from an overloaded host. If it is a desktop and no console connection, then it is better candidate than a desktop with console connection or a server with or without console connection. Basically this logic would just want to minimize the pain caused by the short lag when a VM is live migrated.

Can I assume that a Desktop is only used when a console is connected?

----- Original Message -----
> From: "Itamar Heim" <iheim at redhat.com>
> To: "Laszlo Hornyak" <lhornyak at redhat.com>
> Cc: "Yair Zaslavsky" <yzaslavs at redhat.com>, "engine-devel" <engine-devel at ovirt.org>
> Sent: Thursday, April 11, 2013 1:10:04 PM
> Subject: Re: [Engine-devel] watchdog
> 
> On 04/11/2013 01:57 PM, Laszlo Hornyak wrote:
> > No what I meant is that
> > if the VM is a server {
> > not having a console connection to it does not mean that it is not used.
> > }
> >
> > Therefore desktops on the same host with no console connection, they may be
> > better candidates for migration. You can connect to servers.
> 
> I'd actually like to lose the distinction between server and desktop
> other than a set of optimizations.
> i.e., if there is an optimization you want to make based on console
> being connected, model that and ask for that specifically (maybe I use
> desktop differently than you think)
> 
> >
> > ----- Original Message -----
> >> From: "Yair Zaslavsky" <yzaslavs at redhat.com>
> >> To: "Tomas Jelinek" <tjelinek at redhat.com>
> >> Cc: "Laszlo Hornyak" <lhornyak at redhat.com>, "engine-devel"
> >> <engine-devel at ovirt.org>
> >> Sent: Thursday, April 11, 2013 12:26:35 PM
> >> Subject: Re: [Engine-devel] watchdog
> >>
> >>
> >>
> >> ----- Original Message -----
> >>> From: "Tomas Jelinek" <tjelinek at redhat.com>
> >>> To: "Laszlo Hornyak" <lhornyak at redhat.com>
> >>> Cc: "engine-devel" <engine-devel at ovirt.org>
> >>> Sent: Thursday, April 11, 2013 11:33:19 AM
> >>> Subject: Re: [Engine-devel] watchdog
> >>>
> >>> Good that you have come up with this! So we will make sure to keep this
> >>> info.
> >>> Thnx for coming up with it!
> >>>
> >>> ----- Original Message -----
> >>>> From: "Laszlo Hornyak" <lhornyak at redhat.com>
> >>>> To: "Tomas Jelinek" <tjelinek at redhat.com>
> >>>> Cc: "engine-devel" <engine-devel at ovirt.org>
> >>>> Sent: Thursday, April 11, 2013 10:25:28 AM
> >>>> Subject: Re: [Engine-devel] watchdog
> >>>>
> >>>>
> >>>>
> >>>> ----- Original Message -----
> >>>>> From: "Tomas Jelinek" <tjelinek at redhat.com>
> >>>>> To: "Laszlo Hornyak" <lhornyak at redhat.com>
> >>>>> Cc: "engine-devel" <engine-devel at ovirt.org>
> >>>>> Sent: Thursday, April 11, 2013 10:02:16 AM
> >>>>> Subject: Re: [Engine-devel] watchdog
> >>>>>
> >>>>>
> >>>>>
> >>>>> ----- Original Message -----
> >>>>>> From: "Laszlo Hornyak" <lhornyak at redhat.com>
> >>>>>> To: "Itamar Heim" <iheim at redhat.com>
> >>>>>> Cc: "engine-devel" <engine-devel at ovirt.org>
> >>>>>> Sent: Thursday, April 11, 2013 9:56:32 AM
> >>>>>> Subject: Re: [Engine-devel] watchdog
> >>>>>>
> >>>>>> Hi,
> >>>>>>
> >>>>>> Isnt someone already working on removing the UI distinction between
> >>>>>> server
> >>>>>> and desktop?
> >>>>> Indeed :)
> >>>>>
> >>>>>>
> >>>>>> However the desktop/server distinction could be useful for scheduling
> >>>>>> information, I hope that will remain.
> >>>>> There will be a combo box: "optimized for server/desktop". That one
> >>>>> will set up the dialog like you would open the new server/desktop
> >>>>> today.
> >>>>> But you will be able to change them - it will be just some sugar. But
> >>>>> there
> >>>>> is no reason
> >>>>> why would we enforce the disabling the e.g. soundcard for server. By
> >>>>> default
> >>>>> we will, but
> >>>>> you can enable it if you want.
> >>>>
> >>>> Ok, so in engine we will still have the VmType in vmStatic?
> >>>>
> >>>> I think it would make sense to use it in scheduling / load balancing
> >>>> - if a VM is a desktop and no user is connected to the console, then the
> >>>> VM
> >>>> is not in use, therefore it is a good candidate for saving power
> >>>> (hibernate,
> >>>> migrate, shutdown, or any other bad things that can happen to a VM)
> >>>> - if a VM is a server, usually no user connected, but it may still be
> >>>> used
> >>>> through its network. Therefore it may not be a good candidate to
> >>>> migrate.
> >>
> >> is this indeed a valid assumption ("if VM is a server..." ) that a user
> >> will
> >> less connect to it?
> >>
> >>
> >>>>
> >>>>>
> >>>>>>
> >>>>>> ----- Original Message -----
> >>>>>>> From: "Itamar Heim" <iheim at redhat.com>
> >>>>>>> To: "Laszlo Hornyak" <lhornyak at redhat.com>
> >>>>>>> Cc: "engine-devel" <engine-devel at ovirt.org>, "Andrew Cathrow"
> >>>>>>> <acathrow at redhat.com>
> >>>>>>> Sent: Wednesday, April 10, 2013 9:38:15 PM
> >>>>>>> Subject: Re: [Engine-devel] watchdog
> >>>>>>>
> >>>>>>> On 04/10/2013 04:59 PM, Laszlo Hornyak wrote:
> >>>>>>>> Hi,
> >>>>>>>>
> >>>>>>>> A new version of the watchdög feature is available in gerrit:
> >>>>>>>>
> >>>>>>>> http://gerrit.ovirt.org/13057 - db
> >>>>>>>> http://gerrit.ovirt.org/13058 - bll
> >>>>>>>> http://gerrit.ovirt.org/13059 - frontend
> >>>>>>>> http://gerrit.ovirt.org/13060 - rest
> >>>>>>>>
> >>>>>>>> http://www.ovirt.org/Features/Watchdog_engine_support
> >>>>>>>>
> >>>>>>>> Since the last update the patchset has gone through major changes
> >>>>>>>> to
> >>>>>>>> meet
> >>>>>>>> the new architectureal and functional requirements.
> >>>>>>>> Also because of the rewrite this is again a preview version under
> >>>>>>>> testing
> >>>>>>>> with some missing functionality, therefore I re-introduced the
> >>>>>>>> [wip]
> >>>>>>>> flag
> >>>>>>>> on it.
> >>>>>>>>
> >>>>>>>> Thx,
> >>>>>>>> Laszlo
> >>>>>>>> _______________________________________________
> >>>>>>>> Engine-devel mailing list
> >>>>>>>> Engine-devel at ovirt.org
> >>>>>>>> http://lists.ovirt.org/mailman/listinfo/engine-devel
> >>>>>>>>
> >>>>>>>
> >>>>>>> just a thought after looking at the feature page having different
> >>>>>>> HA
> >>>>>>> dialog for server/desktop - I'd consider removing the distinction
> >>>>>>> between desktop and server in the GUI wrt HA (i.e., just both have
> >>>>>>> same
> >>>>>>> set of options)
> >>>>>>>
> >>>>>>> (not blocking for this patch)
> >>>>>>>
> >>>>>>>
> >>>>>> _______________________________________________
> >>>>>> Engine-devel mailing list
> >>>>>> Engine-devel at ovirt.org
> >>>>>> http://lists.ovirt.org/mailman/listinfo/engine-devel
> >>>>>>
> >>>>>
> >>>>
> >>> _______________________________________________
> >>> Engine-devel mailing list
> >>> Engine-devel at ovirt.org
> >>> http://lists.ovirt.org/mailman/listinfo/engine-devel
> >>>
> >>
> > _______________________________________________
> > Engine-devel mailing list
> > Engine-devel at ovirt.org
> > http://lists.ovirt.org/mailman/listinfo/engine-devel
> >
> 
> 