[Pacemaker] understanding scores

[Pavlos Parissis]

On 15 November 2010 16:43, Andrew Beekhof <andrew at beekhof.net> wrote:
> On Mon, Nov 15, 2010 at 3:18 PM, Pavlos Parissis
> <pavlos.parissis at gmail.com> wrote:
>> On 15 November 2010 08:07, Andrew Beekhof <andrew at beekhof.net> wrote:
>>> On Fri, Nov 12, 2010 at 7:54 PM, Pavlos Parissis
>>> <pavlos.parissis at gmail.com> wrote:
>>>> Hi,
>>>>
>>>> I am trying to understand how the scores are calculated based on the
>>>> output of ptest -sL and I have few questions
>>>> Below is my scores with a  line number column and the bottom you will
>>>> find my configuration
>>>>
>>>> So, let's start
>>>>
>>>> 1 group_color: pbx_service_01 allocation score on node-01: 200
>>>>  2 group_color: pbx_service_01 allocation score on node-03: 10
>>>>  3 group_color: ip_01 allocation score on node-01: 1200
>>>>  4 group_color: ip_01 allocation score on node-03: 10
>>>> so for so good, ip_01 has 1000 due to resource-stickiness="1000" plus
>>>> 200 from the group location constraint
>>>>
>>>>  5 group_color: fs_01 allocation score on node-01: 1000
>>>>  6 group_color: fs_01 allocation score on node-03: 0
>>>>  7 group_color: pbx_01 allocation score on node-01: 1000
>>>>  8 group_color: pbx_01 allocation score on node-03: 0
>>>>  9 group_color: sshd_01 allocation score on node-01: 1000
>>>>  10 group_color: sshd_01 allocation score on node-03: 0
>>>>  11 group_color: mailAlert-01 allocation score on node-01: 1000
>>>>  12 group_color: mailAlert-01 allocation score on node-03: 0
>>>> hold on now, why all the above resources have 1000 on node-01 and not
>>>> 1200 as fs_01
>>>
>>> its only applied to ip_01, the rest inherit it from there
>>>
>>>>
>>>>  13 native_color: ip_01 allocation score on node-01: 5200
>>>> 5 resources x 1000 from resource-stickiness="1000" plus, right? what
>>>> is the difference between in native and group?
>>>
>>> Many things, can you be specific?
>> In principles what are the difference? if my question sounds stupid
>> then it is because I don't understand the terminology.
>
> well, groups are an ordered collection of natives.
>
>>
>>>
>>>>
>>>>  14 native_color: ip_01 allocation score on node-03: 10
>>>>  15 clone_color: ms-drbd_01 allocation score on node-01: 4100
>>>> why 4100?
>>>
>>> probably the promotion score
>> I have "order pbx_service_01-after-drbd_01 inf: ms-drbd_01:promote
>> pbx_service_01:start"
>> does promotion score you mention come out the above contstraint?
>
> only from colocation constraints
then it comes out from "colocation fs_01-on-drbd_01 inf: fs_01
ms-drbd_01:Master"
which has score inf, where at line 15 score is 4100.
>>
>> I think my issue here is how I look at the numbers, I assume that
>> every time I see score for a resource, that score also includes any
>> scores mentioned before. Is my assumption correct?
>
> often, it depends on what colocation constraints you have set up

Ok, let me ask it differently, how by looking at the output of ptest
-sL can I find the score of a resource for a specific node?
Since the score of a resource for a specific node is mentioned in
several lines, it is not that easy- at least to me.

Cheers,
Pavlos