Clustering weblogic from a common storage box.

Question

          Hi All,
          Please some one help me out setting up a weblogic cluster. We have a requisition
          as fallows:
          Weblogic server needed to be setup in a common storage external box. Then this
          server has to be cluster from two machines. Here I am confused, wether is it possible
          to create a cluster of two servers instances from two machines(using the common
          storage box, where I am going to install weblogic). If this is possible then how
          the weblogic property file is going to deffer.
          Please help me out.
          Thanks,
          Murali Ganji
          

Answer 1

          Hi Robert,
          Thank you very much for the reply.. But I have few doubts regarding the clustering
          of weblogic. Please help me.
          1. Does the document meant (maintaining common file system for the weblogic properties
          files) the installing of weblogic server setup in the common file system or only
          maintaining the common directory for the weblogic for all the clustered servers?
          If the later understanding is correct then does it required all the weblogic servers
          needed to be installed at their various machines to run. In this case how these
          servers are going to make use of the properties file in the common file system(I
          mean does we need to mention the paths any where)?
          2. Can you please help me out in figuring out few draw backs of the common file
          system other than single point failure of all the weblogic servers in the cluster?
          Thanks and regards,
          Murali G
          Robert Patrick <[email protected]> wrote:
          >Hi,
          >
          >First of all, there is no requirement that you use a shared file system
          >when setting up a
          >cluster (make sure you install the service pack for WLS 5.1 as there
          >was a bug in the
          >base product regarding the file system). The reason that the documentation
          >recommends
          >this is to simply the configuration of the cluster.
          >
          >Secondly, WebLogic 5.1 has the capability of using a hierarchy of property
          >files. The
          >global properties file is read first, then if it exists the properties
          >file in the
          >cluster directory (e.g., mycluster/weblogic.properties), and finally
          >if it exists the
          >properties file in the server directory (e.g., mycluster/server###/weblogic.properties
          >where ### is the last octet of the machine's IP address). This allows
          >you to share a
          >directory structure and still have different settings for different clusters/servers.
          >
          >Finally, most people use homogeneous clusters. In a homogeneous cluster,
          >the
          >weblogic.property file is the same across all servers in the cluster.
          >
          >Hope this helps,
          >Robert
          >
          >Murali Ganji wrote:
          >
          >> Hi All,
          >> Please some one help me out setting up a weblogic cluster. We have
          >a requisition
          >> as fallows:
          >> Weblogic server needed to be setup in a common storage external box.
          >Then this
          >> server has to be cluster from two machines. Here I am confused, wether
          >is it possible
          >> to create a cluster of two servers instances from two machines(using
          >the common
          >> storage box, where I am going to install weblogic). If this is possible
          >then how
          >> the weblogic property file is going to deffer.
          >> Please help me out.
          >> Thanks,
          >> Murali Ganji
          >