Load balancing without a cluster...!!!!????

Hi boys!
          I have a question for you: my NES proxy server can realize a load
          balancing between 2 weblogic 6.0 servers that are NOT IN A CLUSTER?
          I've done some tests configuring the obj.conf like the 2 weblogic
          servers were in cluster, but I dont' understand if it works correctly.
          May be I ask too much ...
          Thanks
          Patrizia
          

          I'm assuming your using one browser to test this.
          The first time you access a servlet or a JSP that uses session
          tracking, the WL server will store a cookie in the browser. This
          cookie identifies the IP address and port number of the WLS where
          the request was executed (the Primary), and if it is a clustered
          configuation with session replication enable, also a Secondary
          server.
          The next time you make a request to iPlanet (or Apache), wlproxy
          looks at the cookie and directs you to the same WL server - so
          you won't see any load balancing.
          If you quit out of all your browsers, then start a new browser,
          and access it again, you won't have a WL cookie, and the request
          will get load balanced to one of the WL servers.
          Mike
          Patrizia MB <[email protected]> wrote:
          >Thanks Mike,
          >but I've some problems in verifying what you've asserted.
          >In my obj.conf I've put
          >
          > <Object name="wl" ppath="*/servlet/*">
          >
          > Service fn="wl-proxy" WebLogicCluster="10.0.0.3:7060,10.0.0.8:7060"
          >DebugConfigInfo="ON" Debug="ON"
          >
          > </Object>
          >
          >Note that I have 2 NOT-Clustered WLS instances behind
          >NES: I used
          >the "WebLogicCluster" property in the obj.conf only because
          >this
          >is the only way - as far as I know ! - to specify multiple
          >nodes to the
          >proxy.
          >
          >
          >With your suggestion, accessing the URL
          >"http://<your-nes-server>/?__WebLogicBridgeConfigInfo"
          >I can see this:
          > Query String: '__WebLogicBridgeConfig'
          > This entry is cluster aware.
          > ClusterID (from obj.conf): "10.0.0.3:7060,10.0.0.8:7060"
          > WebLogic Cluster List:
          > 1.Host: '10.0.0.8' Port: 7060 Primary
          > General Server List:
          > 1.Host: '10.0.0.3' Port: 7060
          > 2.Host: '10.0.0.8' Port: 7060
          >
          >
          >
          >
          >
          >In spite of that, there's no load-balancing!
          >I checked the 2 access files on the 2 nodes, and I see
          >that all my
          >requests go to the same server 10.0.0.8.
          >Why?
          >According to which logic 10.0.0.8 has been defined the
          >Primary? (They
          >are both Administration Servers)
          >
          >I hope you'll answer to my questions!
          >
          >TIA
          >
          >Patrizia
          >
          >
          >
          >
          >
          >
          >Mike Reiche wrote:
          >
          >> The wlproxy for NES will round-robin requests to multiple
          >WL
          >> servers if they are clustered or not clustered.
          >>
          >> You can get some additional information by adding the
          >property
          >> DebugConfigInfo=ON to the WL configuration in obj.conf
          >then
          >> hitting the URL...
          >> http://<your-nes-server>/?__WebLogicBridgeConfigInfo
          >>
          >> Check the WL NSAPI doc.
          >>
          >> Mike
          >>
          >> Monteforte Patrizia <[email protected]>
          >wrote:
          >> >Hi boys!
          >> >I have a question for you: my NES proxy server can
          >realize
          >> >a load
          >> >balancing between 2 weblogic 6.0 servers that are
          >NOT
          >> >IN A CLUSTER?
          >> >I've done some tests configuring the obj.conf like
          >the
          >> >2 weblogic
          >> >servers were in cluster, but I dont' understand if
          >it
          >> >works correctly.
          >> >May be I ask too much ...
          >> >
          >> >Thanks
          >> >
          >> >Patrizia
          >> >
          >
          

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              > > >
              > > > --
              > > > Cameron Purdy
              > > > Tangosol, Inc.
              > > > http://www.tangosol.com
              > > > +1.617.623.5782
              > > > WebLogic Consulting Available
              > > >
              > > > "Robert Patrick" <[email protected]> wrote in message
              > > > news:[email protected]...
              > > > > There are not any hardware vendors (yet) that can understand
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              > > > >
              > > > > Cameron Purdy wrote:
              > > > >
              > > > > > Rajesh,
              > > > > >
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              > > > > >
              > > > > > --
              > > > > > Cameron Purdy
              > > > > > Tangosol, Inc.
              > > > > > http://www.tangosol.com
              > > > > > +1.617.623.5782
              > > > > > WebLogic Consulting Available
              > > > > >
              > > > > > "Rajesh" <[email protected]> wrote in message
              > > > > > news:[email protected]...
              > > > > > >
              > > > > > > Hi Cameron,
              > > > > > > Can you elaborate on how it would work with WL5.1 since no in
              memory
              > > > > > replication
              > > > > > > would happen if the servers are standalone.
              > > > > > >
              > > > > > > "Cameron Purdy" <[email protected]> wrote:
              > > > > > > >Yes, this will work fine with WL6. (WL5.1 will work fine as
              long as
              > > > > > cookies
              > > > > > > >are used by the load balancer.)
              > > > > > > >
              > > > > > > >--
              > > > > > > >Cameron Purdy
              > > > > > > >Tangosol, Inc.
              > > > > > > >http://www.tangosol.com
              > > > > > > >+1.617.623.5782
              > > > > > > >WebLogic Consulting Available
              > > > > > > >
              > > > > > > >
              > > > > > > >"paowan" <[email protected]> wrote in message
              > > > > > > >news:[email protected]...
              > > > > > > >> Can I install weblogic as a standalone server on 2 or more
              server
              > > > and
              > > > > > > >> cluster/load balance weblogic using a hardware balancer like
              Alteon
              > > > > > Layer4
              > > > > > > >> switch (of course I will use a centralised storage to
              maintain a
              > > > single
              > > > > > > >copy
              > > > > > > >> of data which will eliminate syncronizing problem among
              servers)?
              > > > > > > >>
              > > > > > > >> BTW, Alteon can support persistent binding. The reason to use
              a
              > > > Layer
              > > > > > > >4
              > > > > > > >> switch is that it is very fast, and this will make the
              application
              > > > > > server
              > > > > > > >> layer transparent to client, the client can think this is a
              single
              > > > > > server
              > > > > > > >> (it don't need to know whether there are 5 weblogic servers
              or 20
              > > > > > weblogic
              > > > > > > >> servers behind switch), and hardware are more reliable,
              sacalable
              > > > and
              > > > > > > >fast.
              > > > > > > >>
              > > > > > > >> I am not sure whether the normal weblogic clustered servers
              need to
              > > > > > > >> share/exchange info on the running memory, if it does, this
              > > > approach
              > > > > > will
              > > > > > > >> fail.
              > > > > > > >>
              > > > > > > >>
              > > > > > > >
              > > > > > > >
              > > > > > >
              > > > >
              >
              

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              > ----------
              > C h r i s t o p h e r A . F r a s e r
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