This is interesting. What is important, afterall? In the case of a grid, it is more like a quorum that allows operations to continue without data loss. I'm not sure if individual instances matter as complete sets of EC2s could go up or down and there still be no effect on cluster as a whole. <br>
<br>Would it not be the cache instances, or jgroups configuration that are the most important managed resource in this case?<br><br>-Adrian<br><br><div class="gmail_quote">On Wed, May 6, 2009 at 11:11 AM, Heiko W. Rupp <span dir="ltr"><<a href="mailto:hwr@redhat.com">hwr@redhat.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Manik Surtani schrieb:<div class="im"><br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Is there a way to use JGroups for discovery? If the console was running <br>
</blockquote>
<br></div>
Yes of course.<div class="im"><br>
<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
in the same VM as any of the cache instances, it could delegate discovery to the cache, which could expose a set of addresses.<br>
</blockquote>
<br></div>
The console (be it Jopr or Embedded Jopr) never connects to a managed<br>
resource itself, but the agent-plugin does this. So you could e.g. have<br>
an agent running within EC2 that has the Infinispan plugin, which talks to<br>
all the cache nodes and the server UI would run in the enterprise and would<br>
talk to that agent.<br>
<br>
The most difficult part would be to get the naming of the individual IS instances<br>
on the various hosts right (*) - especially when only one agent is managing multiple<br>
instances.<br>
<br>
(*) The name of a resource must not change on the next discovery run. That is<br>
why for example the process id is not allowed, as a process restart would find a<br>
different resource and the existing one would be marked as down.<div><div></div><div class="h5"><br>
<br>
Heiko<br>
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