[Pacemaker] The larger cluster is tested.

[yusuke iida]

Hi, Andrew

The shown code seems not to process correctly.
I wrote correction.
Please check.
https://github.com/yuusuke/pacemaker/commit/3b90af1b11a4389f8b4a95a20ef12b8c259e73dc

Regards,
Yusuke

2013/11/7 Andrew Beekhof <andrew at beekhof.net>:
>
> On 7 Nov 2013, at 12:43 pm, yusuke iida <yusk.iida at gmail.com> wrote:
>
>> Hi, Andrew
>>
>> 2013/11/7 Andrew Beekhof <andrew at beekhof.net>:
>>>
>>> On 6 Nov 2013, at 4:48 pm, yusuke iida <yusk.iida at gmail.com> wrote:
>>>
>>>> Hi, Andrew
>>>>
>>>> I tested by the following versions.
>>>> https://github.com/ClusterLabs/pacemaker/commit/3492fec7fe58a6fd94071632df27d3fd3fc3ffe3
>>>>
>>>> load-threshold was checked at 60%, 40%, and 20%.
>>>>
>>>> However, the problem was not solved.
>>>> It will not change but timeout will occur.
>>>
>>> That is extremely surprising.  I will have a look at your logs today.
>>> How many cores do these machines have btw?
>>
>> The machine which I am using by the test is a virtual machine of KVM.
>> There are four physical servers. Four virtual machines are started on
>> each server.
>> Has four core physical server, I am assigned a core of separate to the
>> virtual machine.
>> The number of CPUs currently assigned to the virtual machine is one piece.
>> The memory is assigning 2048 MB per set.
>
> I think I understand whats happening...
>
> The throttling code is designed to keep the cib's CPU usage from reaching 100% (ie. 1 core completely busy).
> In a single core setup, thats already much too late, and with 16 nodes I can easily imagine that even 1 job per machine is going to be too much for an underpowered CPU.
>
> I'm currently experimenting with:
>
>    http://paste.fedoraproject.org/52283/37994581
>
> which may help on both fronts.
>
> Essentially it is trying to dynamically infer a "good" value for batch-limit when the CIB is using too much CPU.
>
>
>
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