Ok the action I wanted to perform was for HA I.e execute a scenario like VM 
boot and in parallel in a separate process , ssh and restart controller node 
for instance
I thought periodic task would be useful for that. I guess I need to look at 
some other way of performing this

From: Boris Pavlovic <bpavlo...@mirantis.com<mailto:bpavlo...@mirantis.com>>
Reply-To: "OpenStack Development Mailing List (not for usage questions)" 
Date: Thursday, November 20, 2014 at 7:03 PM
To: "OpenStack Development Mailing List (not for usage questions)" 
Subject: Re: [openstack-dev] [Rally] Question on periodic task

Hi Ajay,

I am not sure why you are looking that part at all.
everything in openstack/common/* is oslo-incubator code.
Actually that method is not used in Rally yet, except Rally as a Service part 
that doesn't work yet.

As a scenario developer I think you should be able to find everything here:

So I really don't the case when you need to pass something to periodic task.. 
It's not that "task"

Best regards,
Boris Pavlovic

On Fri, Nov 21, 2014 at 3:36 AM, Ajay Kalambur (akalambu) 
<akala...@cisco.com<mailto:akala...@cisco.com>> wrote:
I have a question on

It looks like if I have a method decorated with @periodic_task my method would 
get scheduled in separate process every N seconds
Now let us say we have a scenario and this periodic_task how does it work when 
concurrency=2 for instance

Is the periodic task also scheduled in 2 separate process. I actually want only 
one periodic task process irrespective of concurrency count in scenario
Also as a scenario developer how can I pass arguments into the periodic task


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