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Virgo (Spring DM Server) Clustering [message #536905] Mon, 31 May 2010 13:10 Go to next message
chrisatpinguin is currently offline chrisatpinguin Friend
Messages: 18
Registered: May 2010
Junior Member
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

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Re: Virgo (Spring DM Server) Clustering [message #537092 is a reply to message #536905] Tue, 01 June 2010 10:10 Go to previous messageGo to next message
Glyn Normington is currently offline Glyn NormingtonFriend
Messages: 1222
Registered: July 2009
Senior Member
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 10:11]

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Re: Virgo (Spring DM Server) Clustering [message #539252 is a reply to message #537092] Thu, 10 June 2010 07:56 Go to previous messageGo to next message
Artem B is currently offline Artem BFriend
Messages: 6
Registered: June 2010
Junior Member
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?

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Re: Virgo (Spring DM Server) Clustering [message #649198 is a reply to message #537092] Tue, 18 January 2011 07:44 Go to previous messageGo to next message
Glyn Normington is currently offline Glyn NormingtonFriend
Messages: 1222
Registered: July 2009
Senior Member
For the record, we have tested clustering in Virgo and it works fine. See "Cluster Configuration" in the User Guide for details.

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Re: Virgo (Spring DM Server) Clustering [message #652800 is a reply to message #649198] Sun, 06 February 2011 22:44 Go to previous messageGo to next message
Candy is currently offline Candy Friend
Messages: 3
Registered: February 2010
Junior Member
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

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Re: Virgo (Spring DM Server) Clustering [message #652829 is a reply to message #652800] Mon, 07 February 2011 09:10 Go to previous messageGo to next message
Glyn Normington is currently offline Glyn NormingtonFriend
Messages: 1222
Registered: July 2009
Senior Member
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?

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Re: Virgo (Spring DM Server) Clustering [message #652956 is a reply to message #652829] Mon, 07 February 2011 18:13 Go to previous message
Candy is currently offline Candy Friend
Messages: 3
Registered: February 2010
Junior Member
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 18:14]

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