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Disabling SMB2 on Server 2008 R2

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  • Disabling SMB2 on Server 2008 R2

    This is basically bad news.

    I ran some tests several times last night before and after disabling SMB2 on a fast 2008 R2 server, and a script that took less than 200 seconds to run before jumped to over 400 seconds after!

    I set and reset multiple times on both the server and the W/S and got the same results. And it was run under optimal conditions - I was the only one on the system (was late at night) and there were no other processes running on either side.
    Cole Custom Programming - Terrell, Texas
    972 524 8714
    martin_w_cole@msn.com

    ____________________
    "A young man who is not liberal has no heart, but an old man who is not conservative has no mind." GB Shaw

  • #2
    Re: Disabling SMB2 on Server 2008 R2

    With SMB2 enable the system ran faster? or is it the other way around?
    Andrew

    Comment


    • #3
      Re: Disabling SMB2 on Server 2008 R2

      it is enabled by default - so you don't have to enable it
      but it you disable it, in my tests, it will more than double the time for all actions between the server and the W/S - on a shadowed system. If it is not shadowed, (T/S or Citrix or RDP) then there is no issue, and it would not need to be disabled anyway.
      Cole Custom Programming - Terrell, Texas
      972 524 8714
      martin_w_cole@msn.com

      ____________________
      "A young man who is not liberal has no heart, but an old man who is not conservative has no mind." GB Shaw

      Comment


      • #4
        Re: Disabling SMB2 on Server 2008 R2

        In your tests did your workstation have smb2 as well?
        Andrew

        Comment


        • #5
          Re: Disabling SMB2 on Server 2008 R2

          SMB2 is only on the server

          see http://www.dataaccess.com/whitepaper...adcaching.html
          Cole Custom Programming - Terrell, Texas
          972 524 8714
          martin_w_cole@msn.com

          ____________________
          "A young man who is not liberal has no heart, but an old man who is not conservative has no mind." GB Shaw

          Comment


          • #6
            Re: Disabling SMB2 on Server 2008 R2

            SMB2 is a protocol used by both the server and client.
            Andrew

            Comment


            • #7
              Re: Disabling SMB2 on Server 2008 R2

              Not according to the paper
              Cole Custom Programming - Terrell, Texas
              972 524 8714
              martin_w_cole@msn.com

              ____________________
              "A young man who is not liberal has no heart, but an old man who is not conservative has no mind." GB Shaw

              Comment


              • #8
                Re: Disabling SMB2 on Server 2008 R2

                Why Martin are you wanting to disable SMB2 - is it to stop opportunistic record locking?
                MS server is so fill of S** and expensive at that
                I Apologise if in your crisis time I'm asking for opinion

                My biggest client uses a Unix derivative server with some proprietry op system - I dont know what exactly, but all the dbfs run flawlessly with Alpha. They switched about three years ago. I only handle their IS so Im not involved in the technology side.
                I will get details - they just find MSsever 2008 too costly

                Comment


                • #9
                  Re: Disabling SMB2 on Server 2008 R2

                  Reread the paper did not see where it said SMB2 is only at the server.

                  Found this http://msdn.microsoft.com/en-us/libr...795(v=prot.13). The reason I asked is I have found file copy from an SMB2 client to a SMB1 server takes longer than if using a SMB1 client. I was curious if in your testing you ran into this.
                  Andrew

                  Comment


                  • #10
                    Re: Disabling SMB2 on Server 2008 R2

                    Well ..... if you don't have a client that uses Server 2008 R2, then there is nothing to talk about.
                    If they do, and you want to disable opportuninstic record locking to deal with indexes getting out of synch, then there is.

                    I'm not in to the philosophical part - only reality.
                    Cole Custom Programming - Terrell, Texas
                    972 524 8714
                    martin_w_cole@msn.com

                    ____________________
                    "A young man who is not liberal has no heart, but an old man who is not conservative has no mind." GB Shaw

                    Comment


                    • #11
                      Re: Disabling SMB2 on Server 2008 R2

                      SMB1 was Server 2003 - the issue only applies to Server 2008 R2
                      Using SMB2 and copying files may take longer, but the app will run more than twice as slow, so its a non-issue for me.
                      Cole Custom Programming - Terrell, Texas
                      972 524 8714
                      martin_w_cole@msn.com

                      ____________________
                      "A young man who is not liberal has no heart, but an old man who is not conservative has no mind." GB Shaw

                      Comment


                      • #12
                        Re: Disabling SMB2 on Server 2008 R2

                        I suspect what they meant was that if you are copying files from Server 2003 to Server 2008 (smb1 to smb2)
                        If you will read the paper very carefully, the SMB is set only on the server
                        There is a different setting for the Workstation
                        Cole Custom Programming - Terrell, Texas
                        972 524 8714
                        martin_w_cole@msn.com

                        ____________________
                        "A young man who is not liberal has no heart, but an old man who is not conservative has no mind." GB Shaw

                        Comment


                        • #13
                          Re: Disabling SMB2 on Server 2008 R2

                          Originally posted by martinwcole View Post
                          Well ..... if you don't have a client that uses Server 2008 R2, then there is nothing to talk about.
                          If they do, and you want to disable opportunistic record locking to deal with indexes getting out of synch, then there is.

                          I'm not in to the philosophical part - only reality.
                          Completely. I'm asking in theory. But you answered my question there, I think - we WOULD want to disable opportunistic record locking because it DOES cause index corruption? And disabling R2 WILL predictably slow processing.

                          Comment


                          • #14
                            Re: Disabling SMB2 on Server 2008 R2

                            Samba 3.6 includes the first Free Software implementation of Microsoft's new SMB2 file serving protocol.
                            http://www.samba.org/samba/news/releases/3.6.0.html
                            Andrew

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