Red Hat

Hi Guys,

I am not much aware of clusters but i have few questions can someone provide the overview as it would be very helpful for me.

How can i perform cluster failover test to see all the services are failing back to other node ? If it is using veritas cluster then what kind of pre-prequisite i need to follow ?

If it is not using veritas cluster then how to check whether host is clustered or not ? if clustered how can i perform failover to other nodes?

If my question is not clear please forgive me and let me know what are the required steps i need to follow this procedure ?

Thanks

If you have physical access. one easy way might be to unplug a network cable. Just an idea.

Thanks for the information. i worked on windows cluster as we are doing some array based migrations using mpxtool(block level) copy. Now we are working on linux hosts and usually it is an offline migration.
I see some hosts are possible clusters so i want to determine which hosts are cluster ? We have suse systems so i figured out on one server it shows this output does that mean is this a cluster ?

Code:

     #-> find / -name hacluster /var/lib/heartbeat/cores/hacluster

[root@itsusral00019:/]#

Code:

     #-> find / -name cluster
 /lib/modules/2.6.16.60-0.97.1-smp/kernel/fs/ocfs2/cluster
 /lib/modules/2.6.16.60-0.101.1-smp/kernel/fs/ocfs2/cluster
 /lib/modules/2.6.16.60-0.97.1-kdump/kernel/fs/ocfs2/cluster
 /lib/modules/2.6.16.60-0.101.1-kdump/kernel/fs/ocfs2/cluster
 /opt/VRTSpbx/bin/cluster
 /usr/src/linux-2.6.16.60-0.101.1/fs/ocfs2/cluster

[root@itsusral00019:/]#

Code:

     #-> clustat -bash: clustat: command not found

[root@itsusral00019:/]#

Code:

     

     #-> hastatus -sum -bash: hastatus: command not found

from the above output i see this host doesn't have veritas cluster but there is some hacluster when i tried to look for cluster.conf file i dont see and i am not aware for this hacluster.

If you know anything about this please let me know this would be very helpful.