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Apache HTTP proxying for load balancing only to a group of non-clustered WL servers

Update:11-30Source: network consolidation
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          Hi,
          We're running WL Server 6.1 SP 2 on Solaris 2.8.
          For the Apache HTTP proxy plugin, if you use the WebLogicCluster http.conf option,
          do the WL servers you want to load balance across have to be part of a WebLogic
          cluster (if you are prepared to do without failover, as I know it would need to be
          a proper WL cluster to replicate session info for failover). Can you load balance
          across a group of non-clustered WL servers, and maintain the user session to the
          one WL server so that it doesn't switch between servers on alternate requests for
          the same user session, or must the servers be configured as a WebLogic cluster?
          Paul
          We find that if you have a collection of WL servers that are not configured as a
          cluster, that it will load balance alternate requests to each server, but it will
          not pin a user to a single machine according to their session so for 2 servers, 2
          differetn sessions get created, one on each machine.
          Is this because it doesn't normally do this, but sends the user alternately to a
          primary then secondary which works in a cluster because the session is replicated.
          I thought the secondary was only used when the primary failed.
          

The Best Answer

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We're running WL Server 6.1 SP 2 on Solaris 2.8.          >
          > For the Apache HTTP proxy plugin, if you use the WebLogicCluster http.conf
          option,
          > do the WL servers you want to load balance across have to be part of a
          WebLogic
          > cluster (if you are prepared to do without failover, as I know it would
          need to be
          > a proper WL cluster to replicate session info for failover). Can you load
          balance
          > across a group of non-clustered WL servers, and maintain the user session
          to the
          > one WL server so that it doesn't switch between servers on alternate
          requests for
          > the same user session, or must the servers be configured as a WebLogic
          cluster?
          You don't have to use the clustering option. To get failover, you'll have to
          use the JDBC persistence option of WL.
          > We find that if you have a collection of WL servers that are not
          configured as a
          > cluster, that it will load balance alternate requests to each server, but
          it will
          > not pin a user to a single machine according to their session so for 2
          servers, 2
          > differetn sessions get created, one on each machine.
          >
          > Is this because it doesn't normally do this, but sends the user
          alternately to a
          > primary then secondary which works in a cluster because the session is
          replicated.
          > I thought the secondary was only used when the primary failed.
          The primary/secondary stuff requires clustering. If Apache continues to
          "load balance" after the first request, you need to either use JDBC session
          persistence or use a different load balancer (like mod_jk for Apache or a
          h/w load balancer with support for sticky).
          Peace,
          Cameron Purdy
          Tangosol, Inc.
          http://www.tangosol.com/coherence.jsp
          Tangosol Coherence: Clustered Replicated Cache for Weblogic
          "Paul Hammond" <[email protected]> wrote in message
          news:[email protected]
          >
          
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