allow different polling interval for each pollster

[Doug Hellmann]

See the email thread at https://lists.launchpad.net/openstack/msg12916.html for details.

[John Tran (jtran)]

If we were to implement this, it seems like we would no longer be able to use nova's Service and possibly Manager. Has anyone given thoughts on an approach?

[Doug Hellmann (doug-hellmann)]

It seems like we will need to schedule a separate task for each pollster, instead of running them all from one task. I haven't looked at the updated API closely, but the new service/manager/periodic task code in common may make this easier to implement.

[ronghui duan (ronghui-duan)]

What is the status about this wish list? I have an idea about it.
1: let each pollster have its own interval like computer pollster with 10 ticks for example.
2: When Periodic Service is scheduled we check each pollster’s timer. If left ticks is 0, we will invoke that pollster then reset it.
3:The Periodic Service’s frequency should be adjust to little grain size
4:We can also set the interval at run time for each pollster.
How about this? I can supply a patch for review.

[Doug Hellmann (doug-hellmann)]

This work is idea was subsumed into the multi-publisher blueprint (https://blueprints.launchpad.net/ceilometer/+spec/multi-publisher).

[ronghui duan (ronghui-duan)]

Thanks for the info. Please help to review: https://review.openstack.org/#/c/20010/
I wish this can be acceptable as a part of the bp. The pipeline manager can set each pollster's interval by calling set_ticks.
I read the in progress patch. As my understanding:
1:Pipeline manager will transfer pollster data to different type of output for publish.
2:Only one timer for each type of pollster
3:The timer should be determined by the pipeline manager with the input of all publishers.
Am I right?

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/20012

[jiang, yunhong (yunhong-jiang)]

I talked with Ronghui and I will work on this patch since I'm working on the related BPs.

[Matt Rutkowski (mrutkows)]

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allow different polling interval for each pollster" sent on 06/20/2013
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