Topic
IC4NOTICE: developerWorks Community will be offline May 29-30, 2015 while we upgrade to the latest version of IBM Connections. For more information, read our upgrade FAQ.
8 replies Latest Post - ‏2013-11-30T20:19:29Z by jgomba
GermánLeo
GermánLeo
7 Posts
ACCEPTED ANSWER

Pinned topic Create a mix OS Cluster with GPFS

‏2013-11-11T18:57:05Z |

Hi guys, 

 

  I´m really new in the GPFS world and I read a lot of redbooks but cannot find the answer....is possible to create a cluster with 6 Linux SUSE nodes and 3 Windows 2008? All those server will have SAN access to the Storage and use the same FileSystem.

Is there a procedure or man to be followed?

 

Thanks in advance!

Updated on 2013-11-11T18:58:40Z at 2013-11-11T18:58:40Z by GermánLeo
  • LuoChen
    LuoChen
    14 Posts
    ACCEPTED ANSWER

    Re: Create a mix OS Cluster with GPFS

    ‏2013-11-12T15:18:56Z  in response to GermánLeo

    Yes, you can. Please refer to GPFS manual for how to setup GPFS cluster.

    • GermánLeo
      GermánLeo
      7 Posts
      ACCEPTED ANSWER

      Re: Create a mix OS Cluster with GPFS

      ‏2013-11-13T17:41:21Z  in response to LuoChen

      Hi Lou!

        Thank for you answer....well I read the "Concepts, Planning, and Installa tion Guide" for GPFS version 3 release 5.0.11 and I only found a section called " Configuring a mixed Windows and Unix cluster". 

      Could be possible to use this same config between Windows and Linux cluster?

      • LuoChen
        LuoChen
        14 Posts
        ACCEPTED ANSWER

        Re: Create a mix OS Cluster with GPFS

        ‏2013-11-14T03:16:31Z  in response to GermánLeo

        First, you should follow the document in "Installing GPFS on Windows nodes" chapter to prepare windows nodes. After that, you could create a GPFS cluster with all your Linux and Windows nodes, and then setup the file system.

        • GermánLeo
          GermánLeo
          7 Posts
          ACCEPTED ANSWER

          Re: Create a mix OS Cluster with GPFS

          ‏2013-11-19T14:28:37Z  in response to LuoChen

          Thanks Luo!!!

             I found the document, but on the other hand I saw this: 

          http://publib.boulder.ibm.com/infocenter/clresctr/vxrx/index.jsp?topic=%2Fcom.ibm.cluster.gpfs.v3r5.gpfs300.doc%2Fbl1ins_lscfg.htm

          All nodes attached to a common set of LUNS

          In this type of configuration, all of the nodes in the GPFS cluster are connected to a common set of LUNS (for example, over a SAN). The following are some areas to consider with this configuration:
          • The maximum number of nodes accessing a LUN you want to support
          • Whether the storage supports mixed OS access to common LUN
          • The fact that you cannot mix Windows nodes SAN access with Linux or AIX

          The last item say " cannot mix Windows nodes SAN access with Linux or AIX". I ´m a little confuse, maybe you can set a cluster between Windows and Linux but using a NSD server sharing the LUNs over it to the Windows. Is that  what you taking about?

           

          Thanks a lot!

          • vpaul
            vpaul
            79 Posts
            ACCEPTED ANSWER

            Re: Create a mix OS Cluster with GPFS

            ‏2013-11-19T22:47:56Z  in response to GermánLeo

            You can always have mixed OSes attached to the same LUNs. However "concurrent" access of these LUNs from mixed OSs is not supported. For NSD serving, any arbitrary NSD must be served by nodes of just the 1 OS type.

            • GermánLeo
              GermánLeo
              7 Posts
              ACCEPTED ANSWER

              Re: Create a mix OS Cluster with GPFS

              ‏2013-11-20T12:46:52Z  in response to vpaul

              Ok, I understand, but is not the MetaNode the one which control the access to the LUNs with the token?  In this case the concurrent access is never reach, right? So I can mount the GPFS FileSystem in Windows and Linux attachted to the the set of LUNs, they will have access to the LUNs but never at the same time. I´m correct?

               

              Thanks for your answer!

              • yuri
                yuri
                204 Posts
                ACCEPTED ANSWER

                Re: Create a mix OS Cluster with GPFS

                ‏2013-11-23T06:40:30Z  in response to GermánLeo

                Concurrent disk access has nothing to do with metanodes or tokens.  GPFS locking ensures that only one node at a time could be doing IO to a given sector on a given disk.  However, it's perfectly fine for multiple nodes to simultaneously access different areas of the same disk -- if fact this is a requirement for half-way decent performance.

                The problem with concurrent disk access from nodes running different OSes is not GPFS, it's device drivers.  Historically, different OSes have been using different and mutually incompatible failover models for their multi-pathing drivers.  That's why it has been necessary to select "Host OS type" when creating a LUN mapping, at least on some controllers.  Things have been getting saner in the multi-pathing area, so perhaps with certain disk controllers it is now possible to have a configuration where the same LUN is mapped to Linux and Windows at the same time, and with disk controller vendor support.  This isn't a GPFS question though.  We don't test such configurations with GPFS, due to the lack of disk controller vendor support.  Architecturally this could be made work, but you'd be blazing a new trail.

                yuri

  • jgomba
    jgomba
    1 Post
    ACCEPTED ANSWER

    Re: Create a mix OS Cluster with GPFS

    ‏2013-11-30T20:19:29Z  in response to GermánLeo

    Hi, Please review a redbook sg247844.pdf and advice if it answers your questions

    http://www.redbooks.ibm.com/redbooks.nsf/searchsite?SearchView&query=sg247844