On Sun, Apr 6, 2014 at 3:37 PM, Kobi Ianko <k...@redhat.com> wrote: > Joining in... > From my point of view, in real life a user should have that many VDSs on > one Engine (from a DB point of view). > Modern DB system handles tables with millions of records and many > relations, Do we really have a performance issue here? > We could prefer a more easy to maintain implantation in this case over DB > performance > > Yes we do. We make many queries on the VDS view, which is a VERY complex view.
> > ----- Original Message ----- > > From: "Gilad Chaplik" <gchap...@redhat.com> > > To: "Liran Zelkha" <liran.zel...@gmail.com> > > Cc: de...@linode01.ovirt.org, "engine-devel" <engine-de...@ovirt.org> > > Sent: Sunday, April 6, 2014 3:32:26 PM > > Subject: Re: [Devel] [Engine-devel] vds_dynamic refactor > > > > ----- Original Message ----- > > > From: "Liran Zelkha" <liran.zel...@gmail.com> > > > To: "Gilad Chaplik" <gchap...@redhat.com> > > > Cc: "Itamar Heim" <ih...@redhat.com>, de...@linode01.ovirt.org, > > > "engine-devel" <engine-de...@ovirt.org> > > > Sent: Sunday, April 6, 2014 3:26:24 PM > > > Subject: Re: [Engine-devel] vds_dynamic refactor > > > > > > On Sun, Apr 6, 2014 at 3:18 PM, Gilad Chaplik <gchap...@redhat.com> > wrote: > > > > > > > ----- Original Message ----- > > > > > From: "Itamar Heim" <ih...@redhat.com> > > > > > To: "Liran Zelkha" <liran.zel...@gmail.com> > > > > > Cc: "Gilad Chaplik" <gchap...@redhat.com>, > de...@linode01.ovirt.org, > > > > "engine-devel" <engine-de...@ovirt.org> > > > > > Sent: Sunday, April 6, 2014 11:33:12 AM > > > > > Subject: Re: [Engine-devel] vds_dynamic refactor > > > > > > > > > > On 04/06/2014 11:32 AM, Liran Zelkha wrote: > > > > > > > > > > > > > > > > > > > > > > > > On Sun, Apr 6, 2014 at 11:22 AM, Itamar Heim <ih...@redhat.com > > > > > > <mailto:ih...@redhat.com>> wrote: > > > > > > > > > > > > On 04/03/2014 07:51 PM, Liran Zelkha wrote: > > > > > > > > > > > > The problem is with both updates and selects. > > > > > > For selects - to get all the information for the VDS we > have > > > > > > multiple > > > > > > joins. Adding another one will hurt performance even > more. > > > > > > For updates - we have vds_static thats hardly changed. > > > > > > vds_statistics > > > > > > that changes all the time. vds_dynamic is not changed > allot - > > > > but > > > > > > is > > > > > > updated all the time because of the status. I think it's > best > > > > to > > > > > > split > > > > > > it to the two existing tables (BTW - relevant for VM as > well) > > > > > > > > > > > > > > > > > > but we don't update it unless the status has changed, which > is a > > > > > > rare occurance? > > > > > > > > > > > > Actually - no. We can definitely see times we are updating > > > > > > vds_dynamic > > > > > > with no reason at all. I tried to create patches for that - but > it > > > > > > happens from many different places in the code. > > > > > > > > > > what would be updated vds_dyanmic for status not originating in > update > > > > > run time info? > > > > > > > > We have separate DB flows for that (updateStatus and > > > > updatePartialVdsDynamicCalc and more in VdsDynamicDAODbFacadeImpl). > > > > A question: do you know if we update status in updateVdsDynamic? :-) > not > > > > sure but I found a possible race for pending resources (cpu, mem), > LOL > > > > :-) > > > > > > > > I think we do but not sure. Will check. > > > > Of course it is, that was a rhetorical question :-) (a lot of emoticons > and > > LOLs ;-)) > > > > > > > > > > > > Still holds my original thought for having vds_on_boot. > > > > > > > > > > > > > > > Let's talk f2f on Tuesday? > > > > I'd prefer to reach conclusions here, I'd like everyone to be involved > in a > > root issue like this one. > What is the update frequency of this field? > > > > > > > _______________________________________________ > > Devel mailing list > > Devel@ovirt.org > > http://lists.ovirt.org/mailman/listinfo/devel > > >
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