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тАО12-17-2008 06:59 AM
тАО12-17-2008 06:59 AM
Oracle apllication clustering R12
We have two node env (RX3600), on these nodes we are using Oracle RAC 10G for Database clustering, but for high availability of application we want to use SGeRAC. My question is that is our decision is right or what we should add or change in this solution?
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тАО12-17-2008 07:14 AM
тАО12-17-2008 07:14 AM
Re: Oracle apllication clustering R12
And you want to use a SG to have HA on the new application ?
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тАО12-17-2008 07:16 AM
тАО12-17-2008 07:16 AM
Re: Oracle apllication clustering R12
Oracle RAC ships with its own clustering solution.
There are certain deployment scenarios that do require SGeRAC. Others do not.
As I recall RAC 10G has its own clustering solution and can handle active-active deployment.
It might lead to a simpler deployment without SG. What specific feature of SGeRAC do you need not provided by Oracle clustering.
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тАО12-17-2008 08:57 PM
тАО12-17-2008 08:57 PM
Re: Oracle apllication clustering R12
Thanks for your replies.
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тАО12-29-2008 03:22 PM
тАО12-29-2008 03:22 PM
Re: Oracle apllication clustering R12
You can use a load balancer to act as a front door for the application. Behind the load balancer there will be one or more hosts -- depending on what the application supports -- running the application. If a running host fails, the load balancer will redirect clients to another host.
If the application cannot span multiple hosts, then you can use either ServiceGuard (SG) or Oracle Clusterware (OCW) for failover to a standby system; if the application or host fails, it is automatically started up on a seperate server. While a load-balancer can still be used to redirect clients to the running system, you don't really need it, because SG and OCW can be configured to take over the identity (including IP address) of the failed host. Either SG or OCW could be used for this purpose, you don't need both, and you don't need SGeRAC. Which is "better" is a seperate discussion.
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тАО01-15-2009 10:40 AM
тАО01-15-2009 10:40 AM
Re: Oracle apllication clustering R12
In general, Application level clustering is used when we want to achieve "High Availability (HA)" or when we want session persistence.
In my opinion, you should also raise your query to Oracle as well.
For the technology overview, Kindly check out the white paper "Implementing a Highly Available Oracle EBS Architecture" presented in oracle openworld 2008.
hope that will satisfy your concerns.