2 Replies Latest reply: Mar 25, 2014 4:05 PM by Arturo Gutierrez RSS

    Grid Plug and Play (GPnP) clarification

    Arturo Gutierrez
      I read something about this functionality introduced in Oracle 11g R2, I haven't  very clear as you can get when you add a new node to the cluster is configured automatically.
      I understand that using GNS, you can help reduce the cost of management of IPs and is used with a DHCP Server GNS sevice. But not if there is more functionality that allows a more powerful management software in the installation, management of ASM or RDBMS instances on the new server cluster.

      Would I could clarify whether what is called Grid Plug and Play is the GNS (Grid Naming Service) functionality?
      Or is there more dynamic management capabilities?
      Which role play the gpnp profile file, aka  profile.xml?

      Thank You.
      Best regards.


        • 1. Re: Grid Plug and Play (GPnP) clarification
          Vandana B -Oracle

          Hello Arturo,


          GPnP and GNS are both independent of each other


          From 11gR2 onwards, the voting files can be hosted on ASM. And for ASM to come up we need cssd daemon. And for cssd to start the cluster needs to access the voting files.


          This information of voting files location is stored in the GPnP (Grid Plug and Play) profile file.


          GNS, is for name resolution in the cluster. For clients outside the cluster to find the virtual hosts in the cluster, we provide a Grid Naming Service (GNS). This works with any higher-level DNS to provide resolvable names to external clients. DHCP provides dynamic configuration of the hosts IP address, but does not provide a good way to produce names that are useful to external clients. As a result, it has been uncommon in server complexes. In Oracle Clusterware 11g release 2 (11.2), this problem is solved by providing clusterwares own service for resolving names in the cluster, and connecting this to the DNS that is visible to the clients.


          Ref: DNS and DHCP Setup Example for Grid Infrastructure GNS (Doc ID 946452.1)



          Vandana - Oracle

          • 2. Re: Grid Plug and Play (GPnP) clarification
            Arturo Gutierrez


            Thanks for the clarification.

            Best regards