Open Stack

Hi Don,

Thanks for your answer.
I'm extending OpenStack (in context with my Bachelor Thesis) to track
hardware information such as CPU temperature. Among other things I extended
resource_tracker.py. I only wanted to increase this interval for testing
purpose. I'm aware of the costs and maybe have to move my code for these
hardware information updates so that they are independent from the (free)
resource tracking.

Thanks,

Kai


2014-07-01 1:40 GMT+02:00 Dugger, Donald D <donald.d.dugger at intel.com>:

>  Kai-
>
>
>
> Looking at the code the 60 second interval is hard coded and not
> changeable via a config parameter.
>
>
>
> Having said that, and given that it’s a fairly expensive operation to
> update the DB for `every` compute node in the system, maybe the better
> question is why do you want to increase the update frequency?  Do you
> really expect to be creating/deleting instances so fast on a single node
> that a 60 second latency in the update of the stats is really a problem?
>
>
>
> --
>
> Don Dugger
>
> "Censeo Toto nos in Kansa esse decisse." - D. Gale
>
> Ph: 303/443-3786
>
>
>
> *From:* Kai Brennenstuhl [mailto:kai.brennenstuhl at gmail.com]
> *Sent:* Thursday, June 26, 2014 6:56 AM
> *To:* openstack at lists.openstack.org
>
> *Subject:* [Openstack] [openstack][nova] Compute node update interval
>
>
>
> Hi,
>
>
> how can I specify the interval in which the (free) resources of my compute
> nodes are updated and written into the DB?
>
>  I looked into nova.conf doc and already changed the following attributes:
>
> heal_instance_info_cache_interval = 20
>
> service_down_time = 20
>
> periodic_fuzzy_delay = 20
>
> qpid_heartbeat = 20
>
> scheduler_driver_task_period = 20
>
>
>
> call_timeout = 20
>
> db_check_interval = 20
>
>
>
> But the update interval in which the resources are written into the
> database still is about one minute.
>
>
>
> Which parameters should I change? Or is this configuration done somewhere
> else than in nova.conf?
>
>  Kind regards
> Kai
>
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