Questions related to DASH copy

Last post 03-09-2016, 9:24 AM by Nick Morkot. 1 replies.
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  • Questions related to DASH copy
    Posted: 03-04-2016, 12:44 PM



    I'm currently configuring a replication (DASH) between two sites. The replication is performed over a WAN connection.

    I have the following questions:

    1/ I assume DASH copy is using UDP and on an upper (software) layer a control mechanism; instead of TCP?

    2/ When I execute a DASH copy between two media agents, I assume it opens a bunch of dynamic ports to replicate the data? How can I find which ports are being used?

    3/ The current throughput listed in the job controller, is this the througput of the data non-deduplicated or deduplicated? How can I find the throughput (GB/h) which is effectively sent over the WAN?

    Thank you for your help!

    Ruben Renders
    My blog:
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  • Re: Questions related to DASH copy
    Posted: 03-09-2016, 9:24 AM


    Q1 - TCP vs UDP. I might be under correction for this one but as far as I am aware it is TCP.

    Q2 - Besides the standard ports, 8400 and 8402 on the MAs and 8401 on the Commserve additonal high ports are allocated for any additonal process that is initiated such as a DASH Copy. If you are familiar with the registry editor you can find these high ports for inter process communications under Instance001/Session in the registry. They are dynamically assigned and recored in the registry when the session is created. These is not a bunch but a port will be assigned per communication process.

    Q3 - The throughput given is of the application size so it reflects the overall throughput. If you look at the job details or at the streams it provides a figure for data copied. You can use this figure along with the time taken to give you an actual throughput for the WAN.


    Hope this helps


    Kind Regards


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