Heterogeneous clustering with WinNT and Solaris machines.

Question

          Hi All,
          I've deployed my applications on two WinNT machines which are running in cluster with iWS41. as proxy
          server. The shared directory for this clustering is residing on one of these NT machine. I want to put one more
          Solaris machine in this clustering. Can anybody suggest me, how the new Solaris machine will access that
          shared directory residing on another WinNT machine in LAN, I'm new to Solaris, I also want to know that will
          there be any issues regarding this heterogeneous environment for clustering.
          Regards,
          Jitendra Kumar.
          

Answer 1

          Hi,
          If m/c on which shared directoy is, goes
          down, all WLS running in cluster will report the problem.
          Further WLS may stop unless and untill shared directory is
          available again.
          Mind it, all WLS should be of same version and same SP on all
          for running in cluster perfectly and also same EJBs version
          on all m/c if u go for same EJBs copies on all m/c and not using
          shared directory.
          Regards,
          Jitendra.
          "Bernhard Lenz" <[email protected]> wrote:
          >I'm a bit confused...
          >
          >Both Rock and you are recommending not to copy the deployed files to a
          >shared directory because of the single point of failure. My concern is that
          >our admins won't be able to handle multiple copies of the same files and
          >debugging a cluster where nodes behave differently because of versioning
          >issues might be very difficult. Please help me to clarify the following
          >question. Let's say the shared directory is on a separate machine that does
          >not have a WL node running on it. All nodes within the WL cluster boot up
          >fine and load their files and beans from the shared directory. Now the file
          >server with the shared directory goes down. Does it affect the running node
          >instances of the cluster? Do they access e.g. the deployed beans during
          >runtime or do they only load them upon startup? If last is true a crashed
          >shared directory would have no effect on a running cluster.
          >
          >Please help to clarify.
          >
          >Thanks
          >Bernie
          >
          >
          >"Prasad Peddada" <[email protected]> wrote in message
          >news:[email protected]...
          >> There is absolutely no necessity to use shared file system to start
          >servers in a cluster.
          >>
          >> All you have to do is start the servers in a cluster mode and use the same
          >multicast address. Make sure you have identical settings
          >> on both servers as far as application deployment is concerned.
          >>
          >> Other than that there is no dependencies.
          >>
          >> - Prasad
          >>
          >> Jitendra Kumar wrote:
          >>
          >> > Hi Rock,
          >> >
          >> > There r two properties :
          >> > -weblogic.system.home
          >> > -weblogic.home
          >> > second one is the local home where a server will look for myserver
          >directory.
          >> > First one is the one where all servers who want to join will look for
          >mycluster directory.
          >> >
          >> > my concern is that in case of NT boxes first properties is that
          >destination of u'r shared directory, so to specify
          >> > that shared directory on Solaris what to give as on NT it is being given
          >as :
          >> > "\\<computername>\<shared directory name>"
          >> > Please tell me about that 'SAMBA', from where to get that software and
          >how to install that one.
          >> >
          >> > Regrads,
          >> > Jitendra Kumar.
          >> >
          >> > "Rock" <[email protected]> wrote:
          >> > >
          >> > >Kumar,
          >> > >The system home is the base directory which houses your
          >server...regardless
          >> > >of what u wish to call it. For example, myserver. The system name is
          >the
          >> > >actual name of your server .. ie. myserver.
          >> > >
          >> > >Thus,
          >> > >home = c:\myhome
          >> > >name = myserver
          >> > >
          >> > >This does not mean that each system has to view exactly what is within
          >the directory on the
          >> > >other physical machine necessarily. Each of your instances (on other
          >machines of the same machine)
          >> > >can have individual characteristics.
          >> > >
          >> > >Now, if u are in a clustered environment...u will house yet another
          >directory under the home dir...which
          >> > >u obviously already know about. Then the individual servers will
          >reside under that dir...like
          >> > >myserver1 and myserver 2...they must be unique.
          >> > >
          >> > >The properties up until the individual servers should be the same.
          >Thus, u should not have a
          >> > >problem. Communication between the instances simply are broadcasted on
          >your multicast
          >> > >address. You can specify any differences at the individual server
          >level.
          >> > >
          >> > >So, Im not sure where your concern is based. Again, I have not tried
          >this before.
          >> > >Just try it and let me know what happens...we'll go from there.
          >> > >Im curious.
          >> > >
          >> > >I have other concerns about mixing your systems in a production
          >env...but lets look
          >> > >at this scenario first.
          >> > >
          >> > >"Jitendra Kumar" <[email protected]> wrote:
          >> > >>
          >> > >>Hi Rock,
          >> > >>
          >> > >>U r right, i'm just testing but finally it has to go in production
          >env.
          >> > >>My Solaris machine is in same LAN so multicast communication will not
          >be a problem as of now it's working
          >> > >>fine with NT boxes. But the problem is when u start individual servers
          >in cluster u specify
          >> > >>-Dweblogic.system.home=<shared directory address> and from this shared
          >directory picks up properties files
          >> > >>or verifies JSP or other files during runtime with local files having
          >in directory '\myserver'.
          >> > >>As u suggested the same env on solaris box, that's already in place
          >but the thing is that locating a common
          >> > >>shared directory from Solaris machine for properties file.
          >> > >>As documentation is suggesting for this :
          >> > >>
          >> > >>*****************
          >> > >>A RAID system in which files are striped across multiple disks and
          >parity information is stored so that the
          >> > >> contents of any failed disk can be reconstructed from the
          >remaining disks
          >> > >> Off-the-shelf file servers can provide fault tolerance
          >out-of-the-box, with operating systems such as Solaris and
          >> > >> Windows NT providing the software support. Consult with
          >your hardware supplier for further information on
          >> > >> installing and running such a system
          >> > >>********************
          >> > >>
          >> > >>Can anybody give me some informations regarding set up of the above
          >kind of shared file system.
          >> > >>
          >> > >>Regards,
          >> > >>Jitendra Kumar.
          >> > >
          >>
          >> --
          >> Cheers
          >>
          >> - Prasad
          >>
          >>
          >
          >