[openstack-dev] [oslo][nova] how to best deal with default periodic task spacing behavior

Matthew Gilliard matthew.gilliard at gmail.com
Thu May 22 09:57:45 UTC 2014


We (HP Helion) are completely fine with a change that reduces server load
and makes things more predictable.  It would have been very hard to rely
heavily on the old behaviour.  Thanks for adding me to the patch, too, Matt

  Matthew


On Wed, May 21, 2014 at 4:40 PM, Doug Hellmann
<doug.hellmann at dreamhost.com>wrote:

> On Tue, May 20, 2014 at 10:15 AM, Matt Riedemann
> <mriedem at linux.vnet.ibm.com> wrote:
> > Between patch set 1 and patch set 3 here [1] we have different solutions
> to
> > the same issue, which is if you don't specify a spacing value for
> periodic
> > tasks then they run whenever the periodic task processor runs, which is
> > non-deterministic and can be staggered if some tasks don't complete in a
> > reasonable amount of time.
> >
> > I'm bringing this to the mailing list to see if there are more opinions
> out
> > there, especially from operators, since patch set 1 changes the default
>
> You may get more feedback from operators on the main openstack list.
> I'm still catching up on backlog after the summit, so apologies if
> you've already posted there.
>
> Doug
>
> > behavior to have the spacing value be the DEFAULT_INTERVAL (hard-coded 60
> > seconds) versus patch set 3 which makes that behavior configurable so the
> > admin can set global default spacing for tasks, but defaults to the
> current
> > behavior of running every time if not specified.
> >
> > I don't like a new config option, but I'm also not crazy about changing
> > existing behavior without consensus.
> >
> > [1] https://review.openstack.org/#/c/93767/
> >
> > --
> >
> > Thanks,
> >
> > Matt Riedemann
> >
> >
> > _______________________________________________
> > OpenStack-dev mailing list
> > OpenStack-dev at lists.openstack.org
> > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
>
> _______________________________________________
> OpenStack-dev mailing list
> OpenStack-dev at lists.openstack.org
> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstack.org/pipermail/openstack-dev/attachments/20140522/7aa34204/attachment.html>


More information about the OpenStack-dev mailing list