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local vs remote in clustered environments

Erwin Bredford
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Joined: Feb 11, 2003
Posts: 167
pls i am deploying my aplication in a clustered server (weblogic) environment .pls i would like to ask if in using clustering u will have to call remote home objects in ur code rather than local home objects.
i would pefer local due to better performance .but since i am deploying on different machines, should i then call remote methods from the remote home objects
or does it matter?
thanks


--One learns a lot during a lesson but seeing is not enough,you must do;knowing is not enough ,you must apply--<br />SCJP 1.4,SCBCD,SCEA part 1,OCM JEE Enterprise Architect.
Valentin Tanase
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Joined: Feb 17, 2005
Posts: 704
Hi Chinedu,

You can always use the local interfaces. WL uses cluster-aware stubs when clustering is enable. This means that the stub implements the routing algorithm (which by default is the round-robin) and it will forward the request to the next server instance in the cluster. However WL will always bypass the routing algorithm if the request originates from within the container. WL will redirect the request to the same instance to improve the performances.
Bottom line is that your request (from one ejb to another) will never leave the server instance, no matter whether you�re using remote or local interfaces. The only difference is that using the remote calls will add the extra RMI overhead.
Regards


I think, therefore I exist -- Rene Descartes
Erwin Bredford
Ranch Hand

Joined: Feb 11, 2003
Posts: 167
thanks a lot.
Valentin Tanase
Ranch Hand

Joined: Feb 17, 2005
Posts: 704
You are very welcomed!
 
It is sorta covered in the JavaRanch Style Guide.
 
subject: local vs remote in clustered environments