Re: cman_tool nodes shows different Inc numbers; should I be concerned?

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Stewart Walters wrote:
> Hello List Members,
> 
> I've just joined, so please forgive me in advance if I break some list
> etiquette :-)
> 
> I have a two  node cluster (RHEL5) whereby running "cman_tool nodes" on
> each node net's the following results:
> 
> [root@node01 ~]# cman_tool nodes
> Node  Sts   Inc   Joined               Name
>   1   M    512   2009-01-08 10:59:53  node01.example.com
>   2   M    516   2009-01-08 10:59:54  node02.example.com
> 
> [root@node02 ~]# cman_tool nodes
> Node  Sts   Inc   Joined               Name
>   1   M    516   2009-01-08 10:59:53  node01.example.com
>   2   M    504   2009-01-08 10:35:59  node02.example.com
> 
> As you can see the "Inc" numbers are seen as different from both nodes.
> 
> First off, should I be concerned that they are different?

No, it's perfectly normal that they are different.

> And secondly, what is the Inc number signify anyway?  The man page for
> cman_tool doesn't directly describe what an Inc number is for.  I think
> in my travels in trying to answer this question I found a vague
> reference to the fact that it's something to do with openais, but I
> wouldn't mind if someone could confirm this and/or hit me over the head
> with the clue stick.
> 

Inc is the cluster incarnation number at the time the node joined. It's
a totally pointless piece of information that I think we'll remove in
future releases ;-)


Chrissie

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