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Re: [Linux-cluster] DR node in a cluster



A curiosity question:


How do you make sure that your storage will survive failure of *either* of your site without loss of data and continuity of service?

What storage configuration are you using?


Thanks and regards,



From: linux-cluster-bounces redhat com [mailto:linux-cluster-bounces redhat com] On Behalf Of Paras pradhan
Sent: Thursday, 7 July 2011 02:15
To: linux clustering
Subject: [Linux-cluster] DR node in a cluster




My GFS2 linux cluster has three nodes. Two at the data center and one at the DR site. If the nodes at DR site break/turnoff, all the services move to DR node. But if the 2 nodes at the data center lost communication with the DR node, I am not sure how does the cluster handles the split brain. So I am looking for some recommendation in this kind of scenario. I am usig Qdisk votes (=3) in this case.



Here is the cman_tool status output.




Version: 6.2.0

Config Version: 74

Cluster Name: vrprd

Cluster Id: 3304

Cluster Member: Yes

Cluster Generation: 1720

Membership state: Cluster-Member

Nodes: 3

Expected votes: 6

Quorum device votes: 3

Total votes: 6

Quorum: 4  

Active subsystems: 10

Flags: Dirty 

Ports Bound: 0 11 177  

Node ID: 2

Multicast addresses: x.x.x.244 

Node addresses: x.x.x.96 






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