[Pacemaker] The larger cluster is tested.

[Andrew Beekhof]

On 8 Nov 2013, at 12:10 am, yusuke iida <yusk.iida at gmail.com> wrote:

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

Ah, yes that looks better.
Did it help at all?

> 
> 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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> 
> 
> 
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> Yusuke Iida
> Mail: yusk.iida at gmail.com
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