Re: [openstack-dev] [oslo][nova] how to best deal with default periodic task spacing behavior
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 wrote: > On Tue, May 20, 2014 at 10:15 AM, Matt Riedemann > 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@lists.openstack.org > > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev > > ___ > OpenStack-dev mailing list > OpenStack-dev@lists.openstack.org > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev > ___ OpenStack-dev mailing list OpenStack-dev@lists.openstack.org http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
Re: [openstack-dev] [oslo][nova] how to best deal with default periodic task spacing behavior
On Tue, May 20, 2014 at 10:15 AM, Matt Riedemann 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@lists.openstack.org > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev ___ OpenStack-dev mailing list OpenStack-dev@lists.openstack.org http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
Re: [openstack-dev] [oslo][nova] how to best deal with default periodic task spacing behavior
On Tue, May 20, 2014 at 8:00 AM, Davanum Srinivas wrote: > @Matt, > > Agree, My vote would be to change existing behavior. > Same. I think its reasonable to say the current behavior is not ideal (otherwise we wouldn't have changed it), and that the new behavior is better for the vast majority of folks. > > -- dims > > On Tue, May 20, 2014 at 10:15 AM, Matt Riedemann > 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 > > 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@lists.openstack.org > > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev > > > > -- > Davanum Srinivas :: http://davanum.wordpress.com > > ___ > OpenStack-dev mailing list > OpenStack-dev@lists.openstack.org > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev > ___ OpenStack-dev mailing list OpenStack-dev@lists.openstack.org http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
Re: [openstack-dev] [oslo][nova] how to best deal with default periodic task spacing behavior
@Matt, Agree, My vote would be to change existing behavior. -- dims On Tue, May 20, 2014 at 10:15 AM, Matt Riedemann 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 > 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@lists.openstack.org > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev -- Davanum Srinivas :: http://davanum.wordpress.com ___ OpenStack-dev mailing list OpenStack-dev@lists.openstack.org http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
[openstack-dev] [oslo][nova] how to best deal with default periodic task spacing behavior
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 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@lists.openstack.org http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
