MultiProcessor Clustering Architecture Question

Comments inlines.
          Cheers - Wei
          Jim Zhou <[email protected]> wrote in message
          news:[email protected]...
          > Wei,
          > When servlet calls ejb, if that ejb is deployed on four wls servers,
          > because the round-robin, only 25% of the chance the servlet and ejb are in
          > same JVM. Am I right on this?
          If your servlet and ejb are deployed on different clusters, the answer is
          yes.
          If they are on the same clusters, WLAS will call the ejb on the same local
          machine, if the call fails, that's the time load-balancing algorithms plays
          into the picture.
          Hope it helps.
          > What do you mean on "WebLogic rjvm will try to
          > call local remote object as much as possible."? How do achieve load
          balancing
          > if the servlet always get the local ejb to serve its request?
          > I have a client going to use 50 low-end Sun box as JSP/Servlet
          cluster,
          > 4~6 high-end Sun box as EJB cluster. Just curious how much performance
          penalty
          > I will get. Thanks.
          >
          > Jim Zhou
          > BEA Professional Service.
          >
          > Wei Guan wrote:
          >
          > > If I were you, I would like to create one cluster with four weblogic
          > > servers. Every server will serve both servlet and ejb. The benefits:
          > > 1) High availabilty and utlilization.
          > > 2) RMI calls between servlet and ejb will be optimized. WebLogic rjvm
          will
          > > try to call local remote object as much as possible. Save
          > > serizliation/deserilization overhead and communication cost.
          > > 3) Better load balancing.
          > >
          > > My 2 cents
          > > --
          > > Cheers - Wei
          > > bahar <[email protected]> wrote in message news:[email protected]...
          > > > Hello,
          > > >
          > > > I have a client who needs to cluster two Sun E420R (4 procesor)
          > > > machines.
          > > >
          > > > I have presented the following architecture for a cluster of two
          > > > machines running 5.1.0 and JDK 1.2.2:
          > > >
          > > > Three Apache WebServers are load balanced via a director. On the
          > > > Application Servers, I have created two clusters (on each machine) for
          > > > the servlets and EJBs. So, basically, each machine has two clusters
          > > > (web and ejb) with two JVMs. So, there are two members of the web
          > > > cluster and two members of the EJB cluster. The apache plugin
          contains
          > > > a comma delimited list of the IP addresses of the machines in the web
          > > > cluster.
          > > >
          > > > I have added a Multi-IP URL in the JNDI ProviderURL for the calls in
          the
          > > > Web Cluster to point to the list of servers in the EJB cluster
          > > > (comma-delimited list).
          > > >
          > > > The Http cluster uses In-Memory replication for HttpSessions.
          > > >
          > > > Is this a valid architecture that will support failover and
          clusterable
          > > > service load balancing? If not, what suggestions should I make?
          > > >
          > > > Thanks in advance.
          > > >
          >

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>
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-----Ursprüngliche Nachricht-----
Von: Mike Wrighton [mailto:[email protected]]
Bereitgestellt: Freitag, 22. August 2008 11:35
Bereitgestellt in: eclipse.technology.rap
Unterhaltung: Will RAP work in a load-balanced system?
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library). In the Draggable class you can define a function unOnLoad
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