[Openais] How Corosync identifies a new node?

Andrew Beekhof andrew at beekhof.net
Mon Mar 15 11:27:13 PDT 2010


On Sat, Mar 13, 2010 at 6:02 AM, Steven Dake <sdake at redhat.com> wrote:
> On Fri, 2010-03-12 at 16:02 +0530, S, Prashanth wrote:
>> Hi!
>>
>> I need to clarify my understanding on how corosync handles addition of a new node.
>> I think whenever a new node is up it will multicast about its arrival.  This will result in gather->recovery->operational state changes and notifying via the config change callback.
>
> The protocol operates according to this document:
> www.cs.jhu.edu/~yairamir/tocs.ps
>
>> I have another question: Does corosync/pacemaker maintain any data about old nodes? If so, is there any significance for maintaining old nodes' data?
>>
>
> Corosync does not, but I am not sure about pacemaker.

Pacemaker keeps some (basically just the name) because it assumes it
will be coming back.
The documentation has details on how to purge it.


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