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BEA/Weblogic: Weblogic cluster on single server

302| Thu, 17 Jul 2008 18:38:00 GMT| grahamkelly| Comments (1)
Hi all. I have a server with a clustered weblogic environment (both clustered instances running on the same server).

The environments were set up a good while ago and the clustering was set up in this way based on reading articles on Weblogic at the time. I was only vaguely not involved at the time, so knew about the decision, but not the details of the discussion at the time.

We've now had a review performed on the architecture and this was one point that was queried. As I was not involved in the original discussion, I need to find any information on clustering in a single server environment.

My opinion is to agree with the reviewer, I can't see any good reasons to implement the server in this way. Does anyone have any thoughts on this? Are there any good reasons to ever do this?

Thanks

[ April 18, 2006: Message edited by: Graham Kelly ]

Keywords & Tags: weblogic, cluster, single, server, bea

URL: http://software.itags.org/bea-weblogic/274061/
 
«« Prev - Next »» 1 helpful answers below.
Depending on the size of the hardware, number of cpus and memory, multiple WebLogic instances on the same machine is typically advised. A single JVM can only scale so far and if the machine is very large you will never be able to use all available resources. For example, prior to JDK 1.5 the JVM could not effectively use more than 2 GB of memory... if your machine has 48 GB of memory you are effectively wasting a ton of resources by limiting the box to a single JVMs. Likewise, the JVMs will never be able to fully utilize a 12-cpu box with a single instance of java running.

So the short answer to your question is... I don't know your particular situation but this is a typical deployment scenario for big hardware.

[ April 19, 2006: Message edited by: Chris Mathews ]

chrismathews | Thu, 17 Jul 2008 18:39:00 GMT |

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