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Virgo (Spring DM Server) Clustering [message #536905]

Mon, 31 May 2010 09:10

Eclipse User

Hi,

currently I'm evaluating the Spring DM-Server for production use in my company.
I like to know, if it will be possible to set up a multiple machine cluster with virgo. We need session replication for the web bundles for fail-over.

I would be happy if there is someone who could help me with setting up a cluster with the current Spring-DM Server 2.0.2 Smile

I did not get it done. I achieved to enable the Cluster part in the configuration and start the server without an error, but the nodes don't communicate with each other. A simple pure Tomcat cluster on my the two test-machines work perfectly so I exclude any network errors.

Regards
Chris

Re: Virgo (Spring DM Server) Clustering [message #537092 is a reply to message #536905]

Tue, 01 June 2010 06:10

Eclipse User

We have not tested clustering or session replication with dm Server or Virgo. I know some people have mentioned attempting this on the dm Server forums, but I don't know how successful their attempts have been. However, we have not received bug reports or support issues around clustering.

You may like to submit a Virgo bug to cover this.

[Updated on: Tue, 01 June 2010 06:11] by Moderator

Re: Virgo (Spring DM Server) Clustering [message #539252 is a reply to message #537092]

Thu, 10 June 2010 03:56

Eclipse User

And what is the standard way to scale up dm Server applications? I am sure people have faced the need to scale with dmServer.

And have anyone tested the dm Server or Virgo with Distributed OSGi?

Re: Virgo (Spring DM Server) Clustering [message #649198 is a reply to message #537092]

Tue, 18 January 2011 02:44

Eclipse User

For the record, we have tested clustering in Virgo and it works fine. See "Cluster Configuration" in the User Guide for details.

Re: Virgo (Spring DM Server) Clustering [message #652800 is a reply to message #649198]

Sun, 06 February 2011 17:44

Eclipse User

Hi, Glyn,

I am trying to understand how does clustering work with bundles in Virgo. For example, I have a bundle that's computationally expensive. The typical job takes up 2 CPUs for 2 minutes. I have a JINI farm set up to handle these jobs.

My questions is:

Can Virgo somehow replace the JINI farm given that all the requests will be from a bundle deployed in Virgo?

How can I scale Virgo?

I may be asking the wrong questions or have the wrong ideas. Feel free to correct me.

Thank you.
Candy

Re: Virgo (Spring DM Server) Clustering [message #652829 is a reply to message #652800]

Mon, 07 February 2011 04:10

Eclipse User

Apart from inheriting Tomcat's clustering features, Virgo has no explicit support for workload balancing or grid computing. It should be possible to build these features into a Virgo application, but the onus will be on the application to provide those features.

If you spot any general features that would make this type of application more tractable in a Virgo setting, I'd be interested to hear. For instance, if you wrapped the JINI support in bundles, are there any problems that are particularly tricky in a Virgo environment?

Re: Virgo (Spring DM Server) Clustering [message #652956 is a reply to message #652829]

Mon, 07 February 2011 13:13

Eclipse User

I haven't gotten so far yet. If we end up wrapping JINI in a bundle, I will definitely report back the results.

[Updated on: Mon, 07 February 2011 13:14] by Moderator

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