I'd like to add one additional point - if you are clustering for
availability, then the application may be important to your business.
I'd like to recommend you take a glance at Arun's post on a successful
glassfish deployment. In particular, step 3 with a subscription and
access to bug patches. Feel free to contact me offline at john dot
clingan at sun dot com if you want to discuss.
http://blogs.sun.com/arungupta/entry/3_steps_for_successful_glassfish
Good luck, and let us know how it goes!!
On Feb 21, 2008, at 10:32 AM, John Clingan wrote:
>
> On Feb 21, 2008, at 3:56 AM, glassfish_at_javadesktop.org wrote:
>
>> John, you're right, but...
>>
>> In my original post i wrote about a "cluster environment with a DAS
>> on a subnet and two nodes on another subnet, firewalled" exactly
>> for these reasons.
>>
>
> OK, I missed that post. From a DAS perspective, I think RAM is going
> to be the resource to watch. Not much in the way of CPU overhead
> with the DAS. As I mentioned, capacity plan as best you can given
> your deployment topology and do your best to not starve the DAS of
> CPU for when you need to manage the cluster. You can actually shut
> down the DAS after the cluster is up-and-running, but then you'll
> have the overhead of DAS startup/shutdown to manage the cluster.
> Probably more trouble than it is worth. Aim jMeter at the cluster -
> with your expected load - while you try to manage the cluster via
> the DAS, and that will give you an idea of what it will be like.
>
>> I've tried the solution Node1+DAS / Node2 because for this test i
>> "only" have 3 servers:
>>
>> - 1 Redhat on vmware on a subnet 10.133.x.x (for DAS)
>>
>> - 2 Redhat on real machines on another subnet 10.138.x.x (for nodes)
>>
>> I cannot use a vmware machine on 10.138 subnet and clients cannot
>> reach 10.133 subnet...
>>
>> So, i have only 3 chances:
>>
>> - DAS+ node on a server and node on the other (overhead and no
>> recovery plan)
>>
>> - Three servers on the 10.138 subnet (Money for hardware and
>> licenses!!!!!! no good..)
>>
>> - Find the ports to enable on firewall and use my first plan!
>>
>> :-)
>>
>> Thanks again!
>> [Message sent by forum member 'shambola' (shambola)]
>>
>> http://forums.java.net/jive/thread.jspa?messageID=260153
>>
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