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From "Rajith Attapattu" <>
Subject RE: [Geronimo] Clustering
Date Thu, 01 Dec 2005 00:28:33 GMT


We maybe able to leverage the Apache Directory for the underlying JNDI
aspect of it (I will look in to this, but might need help)

How about the policy management portion of clustering service??
For ex 
Clustering strategy
Whether to use Sticky vs Random vs other load balancing mechanisms or
are we allowing the user to choose a strategy from above.

We can represent each clustering strategy as a GBean which the user can
pick from (under the Clustering services GBean, I assume you have the
whole clustering feature represented as a GBean ).

So if somebody is not happy about the clustering strategy then simply
write there own and add that as a GBean.

Of course we will have to come up with a neat API for exposing the
aspects that should be open for improvement.

This will also help us to come up with better clustering strategies
later on in the future without a major impact on the code base.

What are your thoughts on this??? Everybody please help with ideas :)


Rajith Attapattu.

-----Original Message-----
From: Jeff Genender [] 
Sent: Wednesday, November 30, 2005 1:13 PM
Subject: Re: [Geronimo] Clustering

Rajith Attapattu wrote:
> Jeff,
> Apologize for late reply, down with flu.
> Is high availability JNDI (or JNDI clustering) a concept brought up by
> JBoss??

I don't know the answer to this question.

> Frankly I am no expert on this, so any pointers will be very helpful.
> see that WADI is yet to implement this. So do u have any documentation
> on this?

This is an area we are all starting to look at.  One area I would 
recommend looking at is seeing if we can leverage the Apache Directory 
to handle the HA component of JNDI.  If so, this may be a much simpler

Thanks for helping out...this is great to have more folks chipping in on


> I assume we will follow the jboss concept closely, but hopefully to
> improve on it.
> Any help is greatly appreciated. 
> Rajith.
> -----Original Message-----
> From: Jeff Genender [] 
> Sent: Monday, November 28, 2005 1:00 PM
> To:
> Subject: Re: [Geronimo] Clustering
> Rajith Attapattu wrote:
>> As per Jeff's request I am currently ramping up on WADI. I guess jeff
> will shortly announce the integration or any other intermediate tasks
> that needs to be done before WADI can be integrated.
>> I guess we will have some discussion on what areas we will work on
> when the plan is announced??
>> Jeff can you pls comment on this?
> I think we just need a couple of Gbeans to get it initially integrated

> in the web tier...I will tackle that.  It currently works under Tomcat

> and Jetty in their standalone configurations.  Gianni is currently 
> working on the OpenEJB session integration with WADI...and we look 
> forward to getting that.
> We are interested in the HA lets definitely get some 
> discussion going on that.
> Jeff
>> With Kind Regards,
>> Rajith Attapattu.
>> ________________________________________
>> From: Panda, Akshaya Kumar (Cognizant)
> [] 
>> Sent: Sunday, November 27, 2005 11:42 PM
>> To:
>> Subject: RE: [Geronimo] Road Map and TODO
>> Jeff/Rajith,
>> Yes i will be intersted to work on this. But before jumping in on, i
> would like to know who all are involved in     what areas so that it
> help me to avoid any duplicate effort.
>> Rajith: can you pl outline what you have planned to do?
>> thanks
>> akshay
>> -----Original Message-----
>> From: Jeff Genender []
>> Sent: Sat 11/26/2005 9:17 PM
>> To:
>> Subject: Re: [Geronimo] Road Map and TODO
>> Panda, Akshaya Kumar (Cognizant) wrote:
>>> I think WADI is going to provide web tier clustering, any initiative
> for HA-JNDI?
>>> thanks
>>> Akshay
>> No, WADI (and probably should be renamed remove the web-only
>> connotations) will be providing all HA facets to Geronimo.  If you
>> interested in this area, this is where we could use a helping hand,
>> feel free to jump in on this.
>> Jeff

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