[Engine-devel] Autorecovery feature plan for review

[Miki Kenneth]

----- Original Message -----
> From: "Ayal Baron" <abaron at redhat.com>
> To: "Yair Zaslavsky" <yzaslavs at redhat.com>
> Cc: engine-devel at ovirt.org
> Sent: Wednesday, February 15, 2012 12:37:46 AM
> Subject: Re: [Engine-devel] Autorecovery feature plan for review
> 
> 
> 
> ----- Original Message -----
> > On 02/14/2012 10:03 PM, Itamar Heim wrote:
> > > On 02/14/2012 09:20 AM, Yair Zaslavsky wrote:
> > >> On 02/14/2012 08:59 AM, Itamar Heim wrote:
> > >>> On 02/14/2012 08:57 AM, Livnat Peer wrote:
> > >>>> On 14/02/12 05:56, Itamar Heim wrote:
> > >>>>> On 02/13/2012 12:32 PM, Laszlo Hornyak wrote:
> > >>>>>> Hi,
> > >>>>>>
> > >>>>>> Please review the plan document for autorecovery.
> > >>>>>> http://www.ovirt.org/wiki/Features/Autorecovery
> > >>>>>
> > >>>>> why would we disable auto recovery by default? it sounds like
> > >>>>> the
> > >>>>> preferred behavior?
> > >>>>>
> > >>>>
> > >>>> I think that by default Laszlo meant in the upgrade process to
> > >>>> maintain
> > >>>> current behavior.
> > >>>>
> > >>>> I agree that for new entities the default should be true.
> > >>>
> > >>> i think the only combination which will allow this is for db to
> > >>> default
> > >>> to false and code to default to true for this property?
> > >> Why can't we during upgrade process set to all existing entities
> > >> in DB
> > >> the value to false, but still have the column defined as
> > >> "default
> > >> true"?
> > > 
> > > because upgrade and clean install are running the same scripts?
> > I guess I still fail to understand.
> > Scenarios (as both upgrade and clean install run the same scripts)
> > a. In environment to be upgraded we have X entities that are non
> > recoverable - after upgrade these X entities have the boolean flag
> > set
> > to false. New entities in the system will be created with auto
> > recoverable set to true.
> > b. In environment to be clean installed -we have 0 existing
> > entities
> > -
> > after clean install all new entities in the system will be create
> > with
> > auto recoverable set to true.
> > Will this be considered a bad behavior?
> > 
> 
> Why is there a field in the db for this?
> Why is there absolutely no description in the wiki what this feature
> *actually* does?
> Why is there a periodic process to do this? iiuc
> host/storage/whatever goes into non-operational mode due to
> monitoring of this object and after a certain amount of time (or
> immediately) where the object was reported to be in an error state
> it is moved to non-operational.
> Monitoring of these objects should just *not* stop and the second it
> is reported ok, move the object back to up/active/whatever state.
> What am I missing?
Let me see if I got it right: it means I've one process that will go over all the "down" objects every X seconds, and will
issue "activate" action per object? this  will be done sequentially I guess...
I would reduce the audit log time to 1 hour. 
> 
> > 
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