Shared file system and other questions

Question

Hi,
          Is shared file system common for all WL in the cluster or each WL has its
          own one.
          Next questin is connected with proxy server.
          I'm not sure if there should be one proxy server for two servers working in
          one cluster or each server should has own proxy server (I mean WL proxy
          server).???
          In my opinion there should be one proxy server which redirect requests to
          server in cluster using some balancing method. But when I read documentation
          about cluster's architectures I saw the picture where each WL cluster server
          had proxy own server. I'm not sure if this picture showed only outline of
          architecture or it was real solution???
          Is it better to install another proxy server (for example Apache) than WL
          proxy server?
          In previous questions I asked if it is possible to replic static classes,
          fields etc. Prasad Peddada told that it is not replicated. But I wonder if
          there exists some method to force replicating it.? Maybe we can implement
          some method and run it?
          Thanks,
          Best regards,
          Robert
          

Answer 1

Mike.
          In WLS51 cluster, it is better to specify different workingDir for each
          server. You can create a weblogic.properties in your per-server directory
          and add jspc properties in that file.
          Cheers - Wei
          "Mike Reiche" <[email protected]> wrote in message
          news:[email protected]...
          >
          > If you share directories between instances -
          > what happens when two WL instances decide to compile
          > the same JSP at the same time?
          >
          > Mike
          >
          >
          > Viresh Garg <[email protected]> wrote:
          > >
          > >
          > >
          > >
          > >"Robert Zaczyñski" wrote:
          > >
          > >> Hi,
          > >> Is shared file system common for all WL in
          > >the cluster or each WL has its
          > >> own one.
          > >
          > >I am not sure I understand your question. We
          > >recommend using shared file system
          > >for ease of maintanence and to get rid of pain
          > >for versioning problems for
          > >application code. It is not a requirement of
          > >WLS cluster. I really don't
          > >understand what you mean by
          > >"Is shared file system common for all WL in
          > >the cluster or each WL has its
          > >own one
          > >"
          > >
          > >>
          > >>
          > >> Next questin is connected with proxy server.
          > >> I'm not sure if there should be one proxy
          > >server for two servers working in
          > >> one cluster or each server should has own
          > >proxy server (I mean WL proxy
          > >> server).???
          > >> In my opinion there should be one proxy server
          > >which redirect requests to
          > >> server in cluster using some balancing method.
          > >But when I read documentation
          > >> about cluster's architectures I saw the picture
          > >where each WL cluster server
          > >> had proxy own server. I'm not sure if this
          > >picture showed only outline of
          > >> architecture or it was real solution???
          > >
          > >One or more proxy servers can be used. One is
          > >just fine, however you **might**
          > >want to use multiple proxies for heavily loaded
          > >application to avoid contention.
          > >All proxy servers will load balance between
          > >all servers in clsuter. a proxy
          > >servers is not attached or bound to an instance
          > >in cluster.
          > >
          > >>
          > >>
          > >> Is it better to install another proxy server
          > >(for example Apache) than WL
          > >> proxy server?
          > >>
          > >> In previous questions I asked if it is possible
          > >to replic static classes,
          > >> fields etc. Prasad Peddada told that it is
          > >not replicated. But I wonder if
          > >> there exists some method to force replicating
          > >it.? Maybe we can implement
          > >> some method and run it?
          > >
          > >I would recommend that for static classes, you
          > >use context parameters of web
          > >application or something similar, why do you
          > >need to replicate them. WHy not
          > >each cluster instance have a local copy and
          > >use their own copy for such
          > >classes/fields?
          > >
          > >>
          > >>
          > >> Thanks,
          > >> Best regards,
          > >> Robert
          > >
          > >Viresh Garg
          > >Principal Developer Relations Engineer
          > >BEA Systems
          > >
          > >
          > >
          > ><!doctype html public "-//w3c//dtd html 4.0
          > >transitional//en">
          > ><html>
          > >
          > ><p>"Robert Zaczyñski" wrote:
          > ><blockquote TYPE=CITE>Hi,
          > ><br>Is shared file system common for all WL
          > >in the cluster or each WL has
          > >its
          > ><br>own one.</blockquote>
          > >
          > ><p><br>I am not sure I understand your question.
          > >We recommend using shared
          > >file system for ease of maintanence and to get
          > >rid of pain for versioning
          > >problems for application code. It is not a requirement
          > >of WLS cluster.
          > >I really don't understand what you mean by
          > ><br>"<i>Is shared file system common for all
          > >WL in the cluster or each
          > >WL has its</i>
          > ><br><i>own one</i>
          > ><br>"
          > ><blockquote TYPE=CITE>
          > ><p>Next questin is connected with proxy server.
          > ><br>I'm not sure if there should be one proxy
          > >server for two servers working
          > >in
          > ><br>one cluster or each server should has own
          > >proxy server (I mean WL proxy
          > ><br>server).???
          > ><br>In my opinion there should be one proxy
          > >server which redirect requests
          > >to
          > ><br>server in cluster using some balancing method.
          > >But when I read documentation
          > ><br>about cluster's architectures I saw the
          > >picture where each WL cluster
          > >server
          > ><br>had proxy own server. I'm not sure if this
          > >picture showed only outline
          > >of
          > ><br>architecture or it was real solution???</blockquote>
          > >
          > ><p><br>One or more proxy servers can be used.
          > >One is just fine, however
          > >you **might** want to use multiple proxies for
          > >heavily loaded application
          > >to avoid contention. All proxy servers will
          > >load balance between all servers
          > >in clsuter. a proxy servers is not attached
          > >or bound to an instance in
          > >cluster.
          > ><blockquote TYPE=CITE>
          > ><p>Is it better to install another proxy server
          > >(for example Apache) than
          > >WL
          > ><br>proxy server?
          > ><p>In previous questions I asked if it is possible
          > >to replic static classes,
          > ><br>fields etc. Prasad Peddada told that it
          > >is not replicated. But I wonder
          > >if
          > ><br>there exists some method to force replicating
          > >it.? Maybe we can implement
          > ><br>some method and run it?</blockquote>
          > >
          > ><p><br>I would recommend that for static classes,
          > >you use context parameters
          > >of web application or something similar, why
          > >do you need to replicate them.
          > >WHy not each cluster instance have a local copy
          > >and use their own copy
          > >for such classes/fields?
          > ><blockquote TYPE=CITE>
          > ><p>Thanks,
          > ><br>Best regards,
          > ><br>Robert</blockquote>
          > >
          > ><p>Viresh Garg
          > ><br>Principal Developer Relations Engineer
          > ><br>BEA Systems
          > ><br> </html>
          > >
          > >
          >