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?
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.
From manpage for cman_tools:
<snip>
Example:
In this example we have a five node cluster that has experienced
a net-
work partition. Here is the output of cman_tool nodes from all
systems:
Node Sts Inc Joined Name
1 M 2372 2007-11-05 02:58:55 node-01.example.com
2 d 2376 2007-11-05 02:58:56 node-02.example.com
3 d 2376 2007-11-05 02:58:56 node-03.example.com
4 M 2376 2007-11-05 02:58:56 node-04.example.com
5 M 2376 2007-11-05 02:58:56 node-05.example.com
Node Sts Inc Joined Name
1 d 2372 2007-11-05 02:58:55 node-01.example.com
2 M 2376 2007-11-05 02:58:56 node-02.example.com
3 M 2376 2007-11-05 02:58:56 node-03.example.com
4 d 2376 2007-11-05 02:58:56 node-04.example.com
5 d 2376 2007-11-05 02:58:56 node-05.example.com
Node Sts Inc Joined Name
1 d 2372 2007-11-05 02:58:55 node-01.example.com
2 M 2376 2007-11-05 02:58:56 node-02.example.com
3 M 2376 2007-11-05 02:58:56 node-03.example.com
4 d 2376 2007-11-05 02:58:56 node-04.example.com
5 d 2376 2007-11-05 02:58:56 node-05.example.com
Node Sts Inc Joined Name
1 M 2372 2007-11-05 02:58:55 node-01.example.com
2 d 2376 2007-11-05 02:58:56 node-02.example.com
3 d 2376 2007-11-05 02:58:56 node-03.example.com
4 M 2376 2007-11-05 02:58:56 node-04.example.com
5 M 2376 2007-11-05 02:58:56 node-05.example.com
Node Sts Inc Joined Name
1 M 2372 2007-11-05 02:58:55 node-01.example.com
2 d 2376 2007-11-05 02:58:56 node-02.example.com
3 d 2376 2007-11-05 02:58:56 node-03.example.com
4 M 2376 2007-11-05 02:58:56 node-04.example.com
5 M 2376 2007-11-05 02:58:56 node-05.example.com
<snip>
At least in the man page example, node-01 consistently has Inc number
2372, as seen consistently from all nodes.
But as you can see in my cluster, both nodes register a different Inc
number for themselves and the other.
Thanks in advance for any information you can provide me regarding this.
Kind Regards,
Stewart
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