If you use Orion's load balancer, it will distribute between multiple
instances in the same cluster-island. So, if you use one cluster island
with multiple servers (instances) running in it, and a load balancer as a
front-end, then you will get fault tolerance if one (or more) instances of
Orion goes down, plus load balancing between the instances runnning in
that cluster-island. If you start up both the load balancer and orion
instances with debugging on (I believe the parameters to pass are in the
clustering readme), you will see all the output of both of these
operations.
Jeff.
On Fri, 6 Jul 2001 17:14:25 -0700
"Gurinder Randhawa" <[EMAIL PROTECTED]> wrote:
>
>
>
>Thanks for the response Jeff, what i wanted was first and foremost was
>if one orion instance fails another one to kick in with session
>replication.
>This sounds like a cluster island. I guess thats all i want.
>
>But isn't a cluster-island used only for "fault tolerance" that is if one
>instance
>fails another one on the island picks it up with session replication ?
>
>Can you distribute (load balance) in one cluster-island or do u need
>multiple cluster islands? I want
>fault tolerance and load balancing between instances (is this multiple
>cluster islands ?).
>
>What would be the best setup for this ? Sorry i think i might be just
>confusing myself more.
>
>If you could clear this up a little it would be great.
>
>Thanks a bunch
>Gurinder
>
>
>
>
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>Jeff Hubbach <[EMAIL PROTECTED]> on 07/06/2001 02:14:04 PM
>
>Please respond to Orion-Interest <[EMAIL PROTECTED]>
>
>To: Orion-Interest <[EMAIL PROTECTED]>
>cc: (bcc: Gurinder Randhawa/Travel Underwriters)
>Subject: Re: Cluster configuration
>
>
>
>
>A cluster-island is just a cluster, because session replication doesn't
>happen between cluster-islands, just inside it. So yes, you need at least
2
>instances per cluster-island, and yes you install 2 separate orion
>instances
>with the same cluster id in the web-site.xml. I didn't run any benchmarks
>on
>my cluster setup, it was more just a proof-of-concept. Is there a reason
>you
>want 2 cluster-islands? because they won't share session information with
>eachother.
>
>Jeff.
>
>Gurinder Randhawa wrote:
>
>> One other question i had was...when you setup a "cluster-island"
>> do you install 2 seperate orion instances with same cluster id in
>> web-site.xml ?
>>
>> We are setting up 2 cluster-islands witha load balancer running behind
>> apache
>> on same host (one physical sun box) for one web-application. So to add
to
>> my question above
>> for 2 cluster-islands do we need to run 4 instances of orion or just 2
?
>> The documentation wasn't
>> clear to me on this....
>>
>> I have it working for a single instance of orion but need to do
>clustering
>> for scalability and
>> fault tolerance issues. How does this perform ?
>>
>> Thanks
>>
>> Gurinder Randhawa
>> Travel Underwriters Group Of Companies
>> IS Department, Senior programmer/analyst
>>
>> Jeff Hubbach <[EMAIL PROTECTED]> on 07/06/2001 07:31:33 AM
>>
>> Please respond to Orion-Interest <[EMAIL PROTECTED]>
>>
>> To: Orion-Interest <[EMAIL PROTECTED]>
>> cc: (bcc: Gurinder Randhawa/Travel Underwriters)
>> Subject: Re: Cluster configuration
>>
>> There's a very nice how-to at:
>> http://www.orionserver.com/docs/http-clustering.html
>>
>> Jeff.
>>
>> Alessandro Fustini wrote:
>>
>> > Hi,
>> > I woul like configure a Orion cluster with 2 PC.
>> > Is it only necessary change orion/application-deloyments/
>> > default/defaultWebApp/orion-web.xml file with
>> > <cluster-config /> add ??
>> >
>> > Thanks a lot for all help
>> >
>> >
>> >
>> > Alessandro Fustini
>> > Java Developer
>> >
>> > e-mail: [EMAIL PROTECTED]
>>
>> --
>> Jeff Hubbach
>> Internet Developer
>> New Media Designs, Inc.
>> www.nmd.com
>
>--
>Jeff Hubbach
>Internet Developer
>New Media Designs, Inc.
>www.nmd.com
>
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