[Pacemaker] attrd_updater - how works?

[Andrew Beekhof]

On Thu, Jan 6, 2011 at 9:28 PM, Michael Schwartzkopff
<misch at clusterbau.com> wrote:
> Hi,
>
> I have a question about the attrd_updater. How does it work exactly? Ok, I
> understand that it uses hysteresis updating the values in the CIB. But what
> happens if the values change just a little bit.

Changed is changed.  Whether they change by a lot or a little has no
baring on the update.
I can imagine it might be a useful option though if someone wanted to
implement it.

> Lets have an example:
>
> I want to measure processor usage. The result will be a number from 0 to 100.
> In the normal case the number would be between 20 and 30, mostly 25, sometimes
> 26, sometimes 22.
>
> If I use attrd_updater to update the CIB, havind the waitung time longer than
> the measurement interval, will the values in the CIB updated at all?
>
> Greetings,
>
> --
> Dr. Michael Schwartzkopff
> Guardinistr. 63
> 81375 München
>
> Tel: (0163) 172 50 98
>
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>