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<font face="Times New Roman, Times, serif">Hi all , <br>
<br>
I have few queries about fence working. <br>
<br>
I am using 2 different the 2 node cluster with Dell and IBM
hardware in two different IDC.<br>
Recently I came across the network failure problem at different
time and I found my 2 nodes are power off state.<br>
<br>
Below is how the situation happened with my 2 different 2 node
cluster. <br>
<br>
With 2 node </font><font face="Times New Roman, Times, serif">
IBM </font><font face="Times New Roman, Times, serif">node
cluster with SAN :--<br>
==============================<br>
1) Network connectivity was failed totally for few minutes. <br>
2) And as per the /var/log/messages both servers failed to fence
to each other and both server was UP as it is with all services. <br>
3) But the "clustat" was showing serves are not in cluster mode
and "regmanger" status was stop.<br>
4) I simply reboot the server. <br>
5) After that I found both server in power off stat. <br>
<br>
<br>
with another 2 node Dell server with DRBD :--<br>
=================================<br>
1) </font><font face="Times New Roman, Times, serif">Network
connectivity was failed totally. <br>
2) DRAC ip was unavailable so fence failed from both server. <br>
3) after some time I fond the servers are shutdown.<br>
</font><font face="Times New Roman, Times, serif"><br>
In normal conditions both cluster work properly <br>
<br>
</font><font face="Times New Roman, Times, serif"> my queries are
now :--<br>
===============<br>
1) What could be the reason for power off ? <br>
2) Does cluster's fencing method caused for the power off of
server ( i.e because of previous failed fence ) ?<br>
3) Is there any test cases mentioned on net / blog / wiki about
the fence , i.e different situation under which fence works.<br>
<br>
Please guide. <br>
<br>
Thanks & Regards<br>
Jayesh Shinde<br>
<br>
</font><font face="Times New Roman, Times, serif"><br>
<br>
</font>
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