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HA Clustering with RAC

From: Ulf <Ulf.Pralle_at_web.de>
Date: 18 Mar 2004 02:47:30 -0800
Message-ID: <57f997b6.0403180247.11eecb62_at_posting.google.com> 





Hi guys,


I'm writing my diploma thesis about Disaster Recovery. I try to differ
types of cluster depending of the layer where they are realized.
Here is my point of view:The aim of a cluster is, that there is an
automatic failover of resources to the secondary site that no
transaction is lost.This means that the OS, the database and the
application (e.g. SAP R/3) must be active on the secondary site.



Here are my questions:


On which layer (OS,DBMS,Application) is the failover realized? Can it
be realized on different layers?Which application does support this
function? Or have all applications to support this function?
Do you always need a special cluster software like HACMP?



I would be glad, if you could answer my questions and give me links
where I can read something about this.



Bye
Received on Thu Mar 18 2004 - 11:47:30 CET












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