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  • Network Transfer Slow - One Way Only

    Hey there, I'm having a weird problem and hoping for some help.
    I have two servers: "Support5" and "ERPDB1".
    I'm trying to transfer some files, about a gig total size; when Support5 is pushing the files to ERPDB1 it goes in under two minutes.
    However, trying to pull the same group of files from Support5 to ERPDB1 takes over an hour.

    Server details:
    Support5 is a HP ML350 G6 with Server 2008 R2 64 bit installed.
    ERPDB1 is a Dell PowerEdge T710 with Server Enterprise 2008 R2 64 bit and is using 4 teamed ethernet ports.
    Both have all their drivers and are completely up to date.

    Any advice would be appreciated.
    Thanks in advance.
    Last edited by sk1331; 26th January 2012, 17:28. Reason: Edit

  • #2
    Re: Network Transfer Slow - One Way Only

    I have a strange problem one year ago, but it was over WAN so it was more difficult to debug
    In my case it was like this:
    ERPDB1 = A
    Support5 = B

    1.Copy form A to B - ok (A>B)
    2.Copy from B to A - ok (B>A)
    3.Upload Form A to B - 10% of Bandwitch (A>B)
    4.Upolad from B to A - ok (B>A)

    So 1=3 but the speed it was diferent

    I did not solved the problem, but you can make the same tests

    Comment


    • #3
      Re: Network Transfer Slow - One Way Only

      Originally posted by Dopicu View Post
      I have a strange problem one year ago, but it was over WAN so it was more difficult to debug
      In my case it was like this:
      ERPDB1 = A
      Support5 = B

      1.Copy form A to B - ok (A>B)
      2.Copy from B to A - ok (B>A)
      3.Upload Form A to B - 10% of Bandwitch (A>B)
      4.Upolad from B to A - ok (B>A)

      So 1=3 but the speed it was diferent

      I did not solved the problem, but you can make the same tests
      What kind of testing did you do?
      I've tried using the same files and up/downloading them to a third server, which worked fine.

      Comment


      • #4
        Re: Network Transfer Slow - One Way Only

        I make a lot of tests but most relevant is what I write before.
        Try to up/downloading on the server with problems.
        Server with probblem A
        Server without problems B
        Conect on A and copy a file from B and afte upload back, After connect on B and download the same file form A and Upload back.
        You will have 4 results and you will see wher is the problem.
        Ther is some routers between servers? if yes traceroute form A to B and form B to A

        Comment


        • #5
          Re: Network Transfer Slow - One Way Only

          Ok I did the test transfer with a 3.38 GB file.
          Results:

          A = ERPDB1; B = Support5

          Connect to A, copy file from B = Over 40 minuites - 620 KB/Second Average
          Connect to A, put file back to B = A minute - 95 MB/Second average
          Connect to B, copy file/put back from/to A =Both A minute - 95 MB/Second average


          I also did the tracert on each server:
          Server A to B was fine.

          However, while on Server B: I noticed a problem in this trace, I've bolded it.
          "Tracing route to ServerA [172.20.10.240]
          over a maximum of 30 hops:
          1 <1 ms <1 ms <1 ms tempserver1[172.20.10.240]
          Trace complete."


          The ipaddress listed is the correct one for Server A but the name is wrong. I checked in DNS and both names are registered to the 172.20.10.240 address.

          I'm going to show the results to my boss tomorrow, delete the unused DNS name (Tempserver), and do another test. Hopefully this is the issue.

          Thanks for recommending the trace route Dopicu, I would've never thought of it.
          Last edited by sk1331; 25th January 2012, 18:44. Reason: Adding information

          Comment


          • #6
            Re: Network Transfer Slow - One Way Only

            Is the same problem that i have in the past
            Please post if this was the problem

            Thanks

            Comment


            • #7
              Re: Network Transfer Slow - One Way Only

              Try disabling the Auto-Tuning Level of the host you are copying files from.

              Code:
              netsh interface tcp show global
              netsh interface tcp set global autotuninglevel=disabled

              Comment


              • #8
                Re: Network Transfer Slow - One Way Only

                Originally posted by vCole View Post
                Try disabling the Auto-Tuning Level of the host you are copying files from.

                Code:
                netsh interface tcp show global
                netsh interface tcp set global autotuninglevel=disabled
                I have disable the autotuning level.
                Testing results:
                The transfer speed is still around 450 KB/Second - an hour.

                Thanks for the suggestion, should I re-enbale autotuning now that it's been eliminated as the cause or should i try disabling it on the second server too?

                Comment


                • #9
                  Re: Network Transfer Slow - One Way Only

                  Ok all DNS entries are fixed.
                  And the speed remains the same.
                  However, I have just brought in a server identical to server A (it's a dell as well, only difference is that is has a 2 port team instead of 4) out of curiosity:
                  The second Dell server is having the same problem.

                  Perhaps there's a compatibility issue between HP and Dell?
                  Any tips on where to start digging into this theory?
                  I've tried Googling the server models but haven't gotten any helpful results.

                  Comment


                  • #10
                    Re: Network Transfer Slow - One Way Only

                    Originally posted by sk1331 View Post
                    Ok all DNS entries are fixed.
                    And the speed remains the same.
                    However, I have just brought in a server identical to server A (it's a dell as well, only difference is that is has a 2 port team instead of 4) out of curiosity:
                    The second Dell server is having the same problem.

                    Perhaps there's a compatibility issue between HP and Dell?
                    Any tips on where to start digging into this theory?
                    I've tried Googling the server models but haven't gotten any helpful results.
                    Now that's interesting! Now here's a question - have you tried copying from Dell to Dell?

                    Comment


                    • #11
                      Re: Network Transfer Slow - One Way Only

                      Just tested Dell to Dell:
                      Transfer speed is over 100 MB/Second the whole time- about a minute to fully transfer.
                      It seems that the problem is limited to being on the dell and trying to copy/cut/transfer or otherwise "pull" the files from the HP.
                      Being on the dell and putting files onto the HP works fine.
                      Being on the hp and putting/pulling files on/from the dells is fine as well.
                      Last edited by sk1331; 26th January 2012, 19:21. Reason: addition

                      Comment


                      • #12
                        Re: Network Transfer Slow - One Way Only

                        Getting ready to open an incident with HP. Will keep this thread updated.

                        Comment

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