Re: [Linux-cluster] Two node cluster - a potential problem of node fencing each other?

2011-03-21 Thread Lon Hohberger
On Sun, Mar 13, 2011 at 12:49:42PM +0530, Parvez Shaikh wrote: Is this situation possible? If so, can two nodes possibly fence (in short shutdown or reboot) each other? Is there anyway out of this situation? http://people.redhat.com/lhh/ClusterPitfalls.pdf -- Lon Hohberger - Red Hat, Inc.

Re: [Linux-cluster] Two node cluster - a potential problem of node fencing each other?

2011-03-21 Thread Kevin Maguire
Hi Lon http://people.redhat.com/lhh/ClusterPitfalls.pdf In that PDF you write: Can be used to create highly scalable NFS servers. I see how you can use GFS1/2 to make a redundant setup, but I am not sure what you mean by highly scalable here, or how to do it? Is there a best practise

Re: [Linux-cluster] Two node cluster - a potential problem of node fencing each other?

2011-03-14 Thread Rajagopal Swaminathan
Greetings, On Sun, Mar 13, 2011 at 7:27 PM, Parvez Shaikh parvez.h.sha...@gmail.com wrote: redundant network link - i trust you were referring to ethernet bonding. This is a fairly common problem called split brain. The two nodes will go into a shootout, fencing each other. There are a few

Re: [Linux-cluster] Two node cluster - a potential problem of node fencing each other?

2011-03-13 Thread Parvez Shaikh
redundant network link - i trust you were referring to ethernet bonding. On Sun, Mar 13, 2011 at 1:19 PM, Ian Hayes cthulhucall...@gmail.com wrote: On Sat, Mar 12, 2011 at 11:19 PM, Parvez Shaikh parvez.h.sha...@gmail.com wrote: Hi all, I have a question pertaining to two node cluster, I

[Linux-cluster] Two node cluster - a potential problem of node fencing each other?

2011-03-12 Thread Parvez Shaikh
Hi all, I have a question pertaining to two node cluster, I have RHEL 5.5 and cluster along with it which at least should have two nodes. In a situation where both nodes of the cluster are up, and have reliable connection to fencing device (e.g. power switch OR any other power fencing device)

Re: [Linux-cluster] Two node cluster - a potential problem of node fencing each other?

2011-03-12 Thread Ian Hayes
On Sat, Mar 12, 2011 at 11:19 PM, Parvez Shaikh parvez.h.sha...@gmail.comwrote: Hi all, I have a question pertaining to two node cluster, I have RHEL 5.5 and cluster along with it which at least should have two nodes. In a situation where both nodes of the cluster are up, and have reliable