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Old 08-07-2008, 09:34 AM   #1
your_shadow03
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RedHat Cluster with NFS?


Hello Guys,

I need your help regarding the Cluster configuration.All I have setup is Two Node Cluster Configuration with one node (Seprate)as Slave which is outside the cluster.All I want is mount point be active all the time on the three nodes for High Availability.

I heard about NFS can do the trick.That is, One need to setup NFS mount point on all the three nodes.

On Failover cluster mount point may shift but NFS mount point will still prevails.

Is it true?

Thanks in advance,



Ajeet
 
Old 08-07-2008, 05:32 PM   #2
MensaWater
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NFS isn't really a "clustered" filesystem. It is a "shared" filesystem. You can have it physically exist on one server and "share" it to as many other systems as you want.

NFS is mainly intended to share commonly used information among servers (e.g. /home for user home directories - keeps you from allocating individual home directories on every server so conserves space).

Clustered filesystems like Oracle's OCFS2 and RedHat's GFS are designed to have multiple nodes not only accessing information at the same time but also allow for writing by multiple nodes. They do this by being aware of what the other nodes are doing. The benefit to such filesystems is they're already mounted so if one node goes down then it is still up on the other one.

It seems you'd want to add your slave as a node for the clustered filesystem for the same purpose.

P.S. OCFS2 and GFS are open source so you don't have to use Oracle Linux or RedHat Linux to use either of them.

Last edited by MensaWater; 08-07-2008 at 05:33 PM.
 
  


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