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  • creating DFS replication folders.....

    hi..

    i am about to set up a DFS setup with a 700GB file store..

    i will need to create a fault tolerant set up, and therefore I will have replication for the whole DFS setup........

    my problem is,...how can i setup replication without having to transfer 700GB via DFS replication??....i wanted to first copy it across via disks to the other servers, and then specify which are the replication targets and not have to start from 0.

    any ideas appreciated. thanks.

  • #2
    Re: creating DFS replication folders.....

    If i'm not mistaken, DFS does not support or is not recommended for data sets that large. I believe the MS recommendation is 64GB. I would check the MS recommendation and best practice for DFS before implementing anything this large.

    Comment


    • #3
      Re: creating DFS replication folders.....

      http://support.microsoft.com/kb/840675
      A maximum file size of 20 gigabytes (GB).
      A maximum of 64 GB of data.
      A maximum of 500,000 files under the replica root.
      A maximum of 1,000,000 simultaneous change orders.
      Marcel
      Technical Consultant
      Netherlands
      http://www.phetios.com
      http://blog.nessus.nl

      MCITP(EA, SA), MCSA/E 2003:Security, CCNA, SNAF, DCUCI, CCSA/E/E+ (R60), VCP4/5, NCDA, NCIE - SAN, NCIE - BR, EMCPE
      "No matter how secure, there is always the human factor."

      "Enjoy life today, tomorrow may never come."
      "If you're going through hell, keep going. ~Winston Churchill"

      Comment


      • #4
        Re: creating DFS replication folders.....

        well thanks for that.

        therefore for our 700GB, we better be looking at a different solution.

        do any of you guys have any experience and or recommendations? thanks.

        Comment


        • #5
          Re: creating DFS replication folders.....

          Well it depends on whether you need High Availability or Disaster Recovery as each has it's own unique needs and requirements. If you need HA you could look at clustering or some other HA solution on the market, such as WANSyncHA from CA XOsoft. If you need DR you could look at DoubleTake from NSI Software.

          Comment


          • #6
            Re: creating DFS replication folders.....

            we want a file server on each side of the WAN.

            we that this file server (files) to be the same on each end.

            therefore, identical server on each end.......users on each end will use their local file server, thus reducing WAN traffic.

            if either file server fails, at least we have the other one to use.

            we want the two file server to synchronize in the evenings...........only the changed data.


            i think the two products recommended are very very expensive.

            Comment


            • #7
              Re: creating DFS replication folders.....

              You could use RoboCopy (free), but it is used mainly for "one-way" synchronization. It sounds like you want "two-way" synchronization. You would need to test it out as I'm not sure it could do what you need.

              Comment


              • #8
                Re: creating DFS replication folders.....

                yeh robocopy is good.

                so 100% if we want to have a 700GB file system, DFS with its File Replication Service can not do it??




                i'll have to look at a few commercial options.

                Comment


                • #9
                  Re: creating DFS replication folders.....

                  I wouldn't recommend DFS for 700GB of data because it is way more than MS recommends.

                  Comment


                  • #10
                    Re: creating DFS replication folders.....

                    Originally posted by joeqwerty View Post
                    I wouldn't recommend DFS for 700GB of data because it is way more than MS recommends.

                    DFS Replication scalability guidelines
                    Updated: July 25, 2006

                    DFS Replication is a highly scalable replication engine that was built to efficiently replicate large sets of content over wide area networks. The following list provides a set of scalability guidelines that have been tested by Microsoft:


                    Each server can be a member of up to 256 replication groups.


                    Each replication group can contain up to 256 replicated folders.


                    Each server can have up to 256 connections (for example, 128 incoming connections and 128 outgoing connections).


                    On each server, the number of replication groups multiplied by the number of replicated folders multiplied by the number of simultaneously active connections must be kept to 1024 or fewer.


                    A replication group can contain up to 256 members.


                    A volume can contain up to 8 million replicated files, and a server can contain up to 1 terabyte of replicated files.


                    The maximum tested file size is 64 gigabytes.
                    that is from http://technet2.microsoft.com/window....mspx?mfr=true


                    from what says, the 64GB is for one file only. it doesn't seem to say that 700GB is too much.

                    ideas?

                    Comment


                    • #11
                      Re: creating DFS replication folders.....

                      do i need to quote myself
                      Marcel
                      Technical Consultant
                      Netherlands
                      http://www.phetios.com
                      http://blog.nessus.nl

                      MCITP(EA, SA), MCSA/E 2003:Security, CCNA, SNAF, DCUCI, CCSA/E/E+ (R60), VCP4/5, NCDA, NCIE - SAN, NCIE - BR, EMCPE
                      "No matter how secure, there is always the human factor."

                      "Enjoy life today, tomorrow may never come."
                      "If you're going through hell, keep going. ~Winston Churchill"

                      Comment


                      • #12
                        Re: creating DFS replication folders.....

                        i think what you quoted was for the pre-R2 DFS limitations.

                        Comment


                        • #13
                          Re: creating DFS replication folders.....

                          A new information.
                          You're using windows 2003 R2

                          I shall have a look at it
                          Marcel
                          Technical Consultant
                          Netherlands
                          http://www.phetios.com
                          http://blog.nessus.nl

                          MCITP(EA, SA), MCSA/E 2003:Security, CCNA, SNAF, DCUCI, CCSA/E/E+ (R60), VCP4/5, NCDA, NCIE - SAN, NCIE - BR, EMCPE
                          "No matter how secure, there is always the human factor."

                          "Enjoy life today, tomorrow may never come."
                          "If you're going through hell, keep going. ~Winston Churchill"

                          Comment


                          • #14
                            Re: creating DFS replication folders.....

                            I just found this:
                            http://technet2.microsoft.com/window....mspx?mfr=true

                            Near the end of the document:
                            DFS Replication scalability limits
                            We recommend that your deployments approach but not exceed the following tested limits:

                            • Each server can be a member of up to 256 replication groups.

                            • Each replication group can contain up to 256 replicated folders.

                            • Each server can have up to 256 connections (for example, 128 incoming connections and 128 outgoing connections).

                            • On each server, the number of replication groups multiplied by the number of replicated folders multiplied by the number of simultaneously replicating connections must be kept to 1024 or fewer. (If the replication schedule is staggered, you do not need to count the connections that are not replicating due to a closed schedule.)

                            • A replication group can contain up to 256 members.

                            A volume can contain up to 8 million replicated files, and a server can contain up to 1 terabyte of replicated files. These are tested numbers and are recommended guidelines for performance and scalability reasons.
                            I think that the 1 TB is the limit.
                            Right now you already have 700 GB of data.
                            How about you're bandwidth?
                            Marcel
                            Technical Consultant
                            Netherlands
                            http://www.phetios.com
                            http://blog.nessus.nl

                            MCITP(EA, SA), MCSA/E 2003:Security, CCNA, SNAF, DCUCI, CCSA/E/E+ (R60), VCP4/5, NCDA, NCIE - SAN, NCIE - BR, EMCPE
                            "No matter how secure, there is always the human factor."

                            "Enjoy life today, tomorrow may never come."
                            "If you're going through hell, keep going. ~Winston Churchill"

                            Comment


                            • #15
                              Re: creating DFS replication folders.....

                              bandwidth is a 100Mbps WAN link....optimally at 20Mbps.

                              what you do think? that 700GB will be cut down to about 500GB soon.........so you think with 500GB we can plan on a DFS-R2 implementation for 3 years or so?

                              thanks heaps.

                              Comment

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