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Re: [Cluster-devel] cluster4 gfs_controld



On 10/13/2011 10:30 PM, Lon Hohberger wrote:
> On 10/13/2011 11:30 AM, David Teigland wrote:
>> On Thu, Oct 13, 2011 at 03:41:31PM +0100, Steven Whitehouse wrote:
>>>> cluster4
>>>> . jid from dlm-kernel "slots" which will be assigned similarly
>>> What is the actual algorithm used to assign these slots?
>>
>> The same as picking jids: lowest unused id starting with 0.  As for
>> implementation, I'll add it to the current dlm recovery messages.
>>
>> (Frankly, I'd really like to just set jid to nodeid-1.  Any support for
>> that?  It would obviously add a slight requirement to picking nodeid's,
>> which 99.9% of people already do.)
> 
> While I think this is simple, I don't think this is the best idea.
> 
> This would only work efficiently if the cluster stack only used whole
> numbers, instead of say "integer" (like native corosync).


Doesn't pacemaker assigns random nodes ID in the 2^31 range? IIRC there
was a long debate at some point in the area. I am sure Andrew can shed
some light here.

Fabio


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