[Linux-cluster] fencing device
jruemker at redhat.com
Wed Dec 10 15:12:10 UTC 2008
Jakub Suchy wrote:
>> |fencing can be a SPOF, you need two fencing devices).
>> ILO is used on many sites successfully.
> It is. Just just have to be careful when using it.
>> |- It's not a shared device. It MUST be on the same network path as
>> | heartbeat.
>> Not true... I have my ILO on my public network and my heartbeat on a private network switch. No problems with fencing in this configuration.
> Talking about two node clusters: Try disconnecting your private network.
> Each node tries to fence each other, iLO is not shared and is on public
> network, therefore it may succeed. If it accidentally happens in the
> same time (and it can), all nodes will fence each other and you end up
> with powered off servers. This is what you don't want to happen...
QDisk can solve this problem.
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