Thank you for your answers,

What we want to achieve in our environment is to build a cluster of 3
DSS servers. Their configuration are common and stored by the GREG. This
section was successfully configured. In the front end we want a load
balancer(LB), which is capable of handling protocol requests(e.g.
http/https) to 3 active DSS nodes in the protocol level. However the
count of the nodes of in the cluster will not be limited to 3. So the LB
should have the capability to recognize new members of the DSS cluster.
My question is what wso2 product (probably ESB) should be used and what
should be done as configuration steps?  




On Wed, 2011-09-21 at 14:06 +0530, Afkham Azeez wrote:
> 
> 
> On Wed, Sep 21, 2011 at 2:01 PM, Sumedha Rubasinghe <[email protected]>
> wrote:
>         
>         
>         On Wed, Sep 21, 2011 at 11:45 AM, guclu akkaya
>         <[email protected]> wrote:
>         
>                 Hi all,
>                 
>                 Currently we are trying to prepare our environment by
>                 clustering 3 DSS
>                 servers in a clustered manner. For that we want one
>                 DSS node to be the
>                 group manager and other to be the slaves. 
>         
>         All DSS nodes have the same capability. Hence, there is no
>         in-built concept of group manager & slaves.
>         
> 
> 
> Group manager is a clustering concept which is supported by the Carbon
> framework. In this setup, one DSS instance can be designated as the
> cluster manager, and contain the cluster management component. This
>  instance can be used for cluster management purposes, in addition to
> its normal DSS activities. 
> 
> 
> An LB is also a special group manager. However, it is not correct to
> make a DSS group manager into an LB.
> 
> 
> 
> 
>         Perhaps what you should be considering is having,
>         -LB (load balancer)
>         -3 DSS nodes
>         -Configuration on G-Reg
>         
>         But, the most accurate answer depends on what you want to
>         achieve & the problem your trying to solve.
>         
>         /sumedha
>          
>                 The articles Introduction to
>                 WSO2 Carbon Clustering and
>                 WSO2 Carbon Cluster Configuration Language were great
>                 help. All members
>                 all the cluster are using a GREG(wso2 governance
>                 registry server) as the
>                 common registry point for the resources such as
>                 deployed services. For
>                 the high availability we also want to add a load
>                 balancer in front of
>                 our cluster. While reading the articles regarding this
>                 matter only ESB
>                 product is mentioned as load balancer. Since the
>                 articles were at least
>                 from one year ago, is other products also supporting
>                 load balancing? Is
>                 it possible for a group manager DSS node also to take
>                 the role of a load
>                 balancer for the cluster?
>                 
>                 Thanks
>                 
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> 
> 
> 
> 
> -- 
> Afkham Azeez
> Director of Architecture; WSO2, Inc.; http://wso2.com
> Member; Apache Software Foundation; http://www.apache.org/
> 
> email: [email protected] cell: +94 77 3320919
> blog: http://blog.afkham.org
> twitter: http://twitter.com/afkham_azeez
> linked-in: http://lk.linkedin.com/in/afkhamazeez
> 
> 
> 
> Lean . Enterprise . Middleware
> 
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