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From Palash Ray <paa...@gmail.com>
Subject Re: Clustered Jini Server? Was: Re: Mirroring to GitHub
Date Wed, 03 Jun 2015 01:16:52 GMT
Excellent. May be we can help each other here.

Let me start by giving some more context around the problem.

Our middle tier that is a Jini-based rmi server. We have a Swing client
that connects to it. In the middle tier, we have lot of processing logic:
fetch something from the database, do some calculation intensive
processing, write the results back to the database.

Of late there has been a huge increase of the loads: the no. of Swing
clients has increased, as has the bulk of the data to be processed. It has
come to a point, where our production server, which is a single machine, is
creaking under the load.

So, we have decided to cluster it. We are planning to have at least 3 or 4
Jini servers and a load balancer to spread out the load evenly.

I was doing a proof of concept using the Jini infrasctrure itself. These
were my thoughts:

*Option 1*

The load balancing architecture here is very very simple. There is a
single load balancer with its own reggie running at 6670. This is the
primary contact point for all clients.

There are multiple reggie involved for load balancing. The following
convention is followed:

1. The reggie for load balancer is at 6670
2. The reggie for the actual jini servers are at 5561, 5562, 5563, etc.

When the load-balancer recieves a request from client, it does the
look-up at the appropriate jini-server and returns the remote service.

*Option 2*

I figured that if we can embed the Jini in a Tomcat and then clustering the
Tomcat would be very easy. But this is still work in progress, and there
are lot of details that I need to figure out.

Please let me know if the above makes sense or is around the same things
that interest you. I would like to have a out of the box Jini solution
that *just
works*. And I am happy to code for any solution that you guys think should
be the way forward.


On Tue, Jun 2, 2015 at 2:14 PM, Patricia Shanahan <pats@acm.org> wrote:

> Also, if there is any chance the bottleneck is in River, I would be very,
> very interested in constructing a benchmark based on your workload that
> demonstrates the scaling problem. I would like to run it against the latest
> unreleased version, which I think may fix some scaling issues. If it still
> shows scaling problems, I want to track them down and see whether they are
> fixable without clustering.
> My most recent professional background, before retiring, was as a
> performance architect working on multiprocessor servers for Cray Research
> and Sun Microsystems. When I first got involved in River I was thinking of
> doing some performance analysis and improvement, one of my favorite games,
> but could not find a suitable benchmark, or an actual user with a scaling
> problem.
> Patricia
> On 6/2/2015 10:24 AM, Greg Trasuk wrote:
>> Palash:
>> Could you expand on your need for a “clustered Jini server”?  What
>> features are you looking for, and what aspects of the application need to
>> be clustered?  This might provide fertile grounds for development.
>> Cheers,
>> Greg Trasuk
>>  On Jun 2, 2015, at 12:38 PM, Palash Ray <paawak@gmail.com> wrote:
>>> Hi Greg, Patricia,
>>> Really happy to see:
>>> https://github.com/trasukg/river-container
>>> I think we are off in the right direction. I have been using river for
>>> almost 2 years now, but only recently started taking an interest in
>>> the code that makes it tick.
>>> Our organisation is facing some scalability issues with Jini of late,
>>> well, I am not blaming Jini here, its just that we need a clustered
>>> Jini server.
>>> To that end I was playing around the code a bit. I have some ideas
>>> which I can discuss with this group later.
>>> I have created a small proof of concept of embedding Jini in a war and
>>> running it in a webserver:
>>> https://github.com/paawak/jini-in-a-war
>>> Also, I keep blogging about Jini with whatever little understanding I
>>> have:
>>> http://palashray.com/java/jini/
>>> In the coming days, I look forward to contributing to the river project.
>>> Thanks,
>>> Palash.
>>> On 6/2/15, Greg Trasuk <trasukg@stratuscom.com> wrote:
>>>> Thanks, Jukka.  And by the way, I’m happy to see you’re still watching
>>>> River!
>>>> Cheers,
>>>> Greg Trasuk.
>>>>  On Jun 2, 2015, at 11:14 AM, Jukka Zitting <jukka.zitting@gmail.com>
>>>>> wrote:
>>>>> Hi,
>>>>> 2015-06-02 1:17 GMT-04:00 Greg Trasuk <trasukg@stratuscom.com>:
>>>>>> I notice that for some reason, the 2.1 branch shows up as current,
>>>>>> you
>>>>>> need to switch
>>>>>> to the 2.2 branch explicitly to see the latest releases.  I’m not
>>>>>> how to change that.
>>>>> You can file an INFRA issue to get the default branch and other GitHub
>>>>> metadata changed.
>>>>> Jukka

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